February 28, 2022

May 31, 2021

Convertible debenture in the principal amount of $4,000,000 (the “U.S. Convertible Debenture 1”) dated October 31, 2018, which bears interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the U.S. Convertible Debenture 1. The U.S. Convertible Debenture 1 was to mature on a date that was three years following issuance. The U.S. Convertible Debenture 1 was convertible into units (the “Convertible Debenture Units”) at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. On July 26, 2019, U.S. Convertible Debenture 1 was amended such that, should the Company issue or sell common stock or equity securities convertible into common stock at a price less than the conversion price of the U.S. Convertible Debenture 1, the conversion price of U.S. Convertible Debenture 1 would be reduced to such issuance price, and the exercise price of the warrant issuable in connection with U.S. Convertible Debenture 1 would be exercisable at a price equal to 137.5% of the adjusted conversion price at the time of conversion. The U.S. Convertible Debenture 1 has other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The U.S. Convertible Debenture 1 is an unsecured obligation of the Company and ranks pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. The Company recorded a discount in the amount of $3,254,896 on the U.S. Convertible Debenture 1. During the three and nine months ended February 28, 2022, $0 and $0 of this discount was charged to operations, respectively. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $90,089 and $270,267 on the U.S. Convertible Debenture 1, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $90,089 and $270,267, respectively. On April 15, 2021, the U.S. Convertible Debenture 1 was amended as follows: (i) the conversion price of the debenture was reduced to $0.30 per unit; and (ii) the maturity date was extended from October 31, 2021 to October 31, 2022. This amendment was accounted for as an extinguishment of debt, and the Company recorded a loss in the amount of $2,038,803 during the year ended May 31, 2021 in connection with this amendment.

Convertible debenture in the principal amount of $1,000,000 (the “U.S. Convertible Debenture 2”) dated October 31, 2018, which bears interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the U.S. Convertible Debenture 2. The U.S. Convertible Debenture 2 was to mature on a date that was three years following issuance. The U.S. Convertible Debenture 2 was convertible into Convertible Debenture Units at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. On July 26, 2019, U.S. Convertible Debenture 2 was amended such that, should the Company issue or sell common stock or equity securities convertible into common stock at a price less than the conversion price of the U.S. Convertible Debenture 2, the conversion price of U.S. Convertible Debenture 2 would be reduced to such issuance price, and the exercise price of the warrant issuable in connection with U.S. Convertible Debenture 2 would be exercisable at a price equal to 137.5% of the adjusted conversion price at the time of conversion. The U.S. Convertible Debenture 2 has other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The U.S. Convertible Debenture 2 is an unsecured obligation of the Company and ranks pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. The Company recorded a discount in the amount of $813,724 on the U.S. Convertible Debenture 2. During the three and nine months ended February 28, 2022, $0 and $0 of this discount was charged to operations, respectively. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $22,522 and $67,567 on the U.S. Convertible Debenture 2, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $22,522 and $67,567, respectively. On April 15, 2021, the U.S. Convertible Debenture 2 was amended as follows: (i) the conversion price of the debentures was reduced to $0.30 per unit; and (ii) the maturity date was extended from October 31, 2021 to October 31, 2022. This amendment was accounted for as an extinguishment of debt, and the Company recorded a loss in the amount of $509,700 during the year ended May 31, 2021.

February 28, 2022

May 31, 2021

Convertible debenture in the principal amount of $100,000 (the “U.S. Convertible Debenture 3”) dated October 24, 2018, which bears interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the U.S. Convertible Debenture 3. The U.S. Convertible Debenture 3 was to mature on a date that was three years following issuance. The U.S. Convertible Debenture 3 was convertible into Convertible Debenture Units at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. On July 26, 2019, U.S. Convertible Debenture 3 was amended such that, should the Company issue or sell common stock or equity securities convertible into common stock at a price less than the conversion price of the U.S. Convertible Debenture 3, the conversion price of U.S. Convertible Debenture 3 would be reduced to such issuance price, and the exercise price of the warrant issuable in connection with U.S. Convertible Debenture 3 would be exercisable at a price equal to 137.5% of the adjusted conversion price at the time of conversion. The U.S. Convertible Debenture 3 has other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The U.S. Convertible Debenture 3 is an unsecured obligation of the Company and ranks pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. The Company recorded a discount in the amount of $75,415 on the U.S. Convertible Debenture 3. During the three and nine months ended February 28, 2022, $0 and $10,474 of this discount was charged to operations, respectively. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $0 and $3,604 on the U.S. Convertible Debenture 3, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $0 and $5,106, respectively. This debenture was repaid in full during the quarter ended November 30, 2021.

Convertible debenture in the principal amount of $532,000 (the “U.S. Convertible Debenture 4”) dated October 25, 2018, which bears interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the U.S. Convertible Debenture 4. The U.S. Convertible Debenture 4 was to mature on a date that was three years following issuance. The U.S. Convertible Debenture 4 was convertible into Convertible Debenture Units at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. On July 26, 2019, U.S. Convertible Debenture 4 was amended such that, should the Company issue or sell common stock or equity securities convertible into common stock at a price less than the conversion price of the U.S. Convertible Debenture 4, the conversion price of U.S. Convertible Debenture 4 would be reduced to such issuance price, and the exercise price of the warrant issuable in connection with U.S. Convertible Debenture 4 would be exercisable at a price equal to 137.5% of the adjusted conversion price at the time of conversion. The U.S. Convertible Debenture 4 has other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The U.S. Convertible Debenture 4 is an unsecured obligation of the Company and ranks pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. The Company recorded a discount in the amount of $416,653 on the U.S. Convertible Debenture 4. During the three and nine months ended February 28, 2022, $0 and $0 of this discount was charged to operations, respectively. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $11,982 and $35,946 on the U.S. Convertible Debenture 4, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $11,982 and $35,946, respectively. On April 19, 2021, the U.S. Convertible Debenture 4 was amended as follows: (i) the conversion price of the debenture was reduced to $0.30 per unit; and (ii) the maturity date was extended from October 31, 2021 to October 31, 2022. This amendment was accounted for as an extinguishment of debt, and the Company recorded a loss in the amount of $271,164 during the year ended May 31, 2021.

Convertible debenture in the principal amount of $150,000 (the “U.S. Convertible Debenture 5”) dated October 26, 2018, which bears interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the U.S. Convertible Debenture 5. The U.S. Convertible Debenture 5 was to mature on a date that was three years following issuance. The U.S. Convertible Debenture 5 was convertible into Convertible Debenture Units at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. The U.S. Convertible Debenture 5 has other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The U.S. Convertible Debenture 5 is an unsecured obligation of the Company and ranks pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. The Company recorded a discount in the amount of $120,100 on the U.S. Convertible Debenture 5. During the three and nine months ended February 28, 2022, $0 and $16,681 of this discount was charged to operations, respectively. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $0 and $5,480 on the U.S. Convertible Debenture 5, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $0 and $7,733, respectively. This debenture was repaid in full during the quarter ended November 30, 2021.

February 28, 2022

May 31, 2021

Convertible debenture payable in the principal amount of $75,000 (the “U.S. Convertible Debenture 6”) dated October 26, 2018, which bears interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the U.S. Convertible Debenture 6. The U.S. Convertible Debenture 6 was to mature on a date that was three years following issuance. The U.S. Convertible Debenture 6 was convertible into Convertible Debenture Units at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. The U.S. Convertible Debenture 6 has other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The U.S. Convertible Debenture 6 is an unsecured obligation of the Company and ranks pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. The Company recorded a discount in the amount of $60,049 on the U.S. Convertible Debenture 6. During the three and nine months ended February 28, 2022, $0 and $8,340 of this discount was charged to operations, respectively. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $0 and $2,740 on the U.S. Convertible Debenture 6, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $0 and $3,866, respectively. This debenture was repaid in full during the quarter ended November 30, 2021.

Convertible debentures payable in the aggregate principal amount of $12,012,000 (the “Canaccord Debentures”) dated December 12, 2018, which bear interest, payable quarterly, at a rate of 8% per annum, with interest during the first eighteen months following issuance being payable by increasing the then-outstanding principal amount of the Canaccord Debentures. The Canaccord Debentures were to mature on a date that was three years following issuance. The Canaccord Debentures were convertible into Convertible Debenture Units at a conversion price of $0.80 per Convertible Debenture Unit. Each Convertible Debenture Unit consisted of (i) one share of the Company’s common stock, and (ii) one-half of one warrant, with each warrant exercisable for three years to purchase a share of common stock at a price of $1.10. The value of the warrants will be recorded when the issuance becomes probable. The Canaccord Debentures have other features, such as mandatory conversion in the event the common stock trades at a particular price over a specified period of time and required redemption in the event of a “Change in Control” of the Company. The Canaccord Debentures are unsecured obligations of the Company and rank pari passu in right of payment of principal and interest with all other unsecured obligations of the Company. During the three months ended November 30, 2019, in two separate transactions, principal in the aggregate amount of $25,857 was converted into an aggregate of 32,321 shares of the Company’s common stock, and warrants to purchase 16,160 shares of common stock. There were no gains or losses recorded on these conversions because they were done in accordance with the terms of the original agreement. No discount was recorded for the fair value of the warrants issued. Because the market price of the Company’s common stock was less than the conversion price on the date of issuance of the Canaccord Debentures, a discount was not recorded on the Canaccord Debentures. During the three and nine months ended February 28, 2022, the Company accrued interest in the amounts of $264,383 and $794,148 on the Canaccord Debentures, respectively. During the three and nine months ended February 28, 2022, the Company made interest payments in the amounts of $264,383 and $793,149, respectively. Also, during the three and nine months ended February 28, 2022, the Company transferred the amounts of $0 and $212,601 from accrued interest to principal of the Canaccord Debentures, respectively. On March 31, 2021, the Canaccord Debentures were amended as follows: (i) the conversion price of the debentures was reduced to $0.30 per unit; (ii) the maturity date was extended from December 12, 2021 to December 12, 2022; (iii) the mandatory conversion threshold was reduced from a daily volume weighted average trading price of greater than $1.20 per share to $0.60 per share for the preceding ten consecutive trading days; and (iv) the exercise price of the warrants issuable upon conversion was reduced from $1.10 to $0.40 and the expiration of the warrants extended until March 31, 2024. This amendment was accounted for as an extinguishment of debt, and the Company recorded a loss in the amount of $3,286,012 during the year ended May 31, 2021. During the quarter ended August 31, 2021, principal in the aggregate amount of $281,000 was converted into an aggregate of 936,666 shares of the Company’s common stock, and warrants to purchase 468,333 shares of common stock. There were no gains or losses recorded on these conversions because they were done in accordance with the terms of the original agreement.

Total - Convertible Notes Payable

Less: Discount

)

)

Convertible Notes Payable, Net of Discounts

February 28, 2022

May 31, 2021

Total - Convertible Notes Payable, Net of Discounts, Current Portion, net of discount of $0 and $1,053,520

Total - Convertible Notes Payable, Net of Discounts, Long-term Portion, net of discount of $0 and $0