Common use of STOCK POWER AND ASSIGNMENT SEPARATE FROM STOCK CERTIFICATE Clause in Contracts

STOCK POWER AND ASSIGNMENT SEPARATE FROM STOCK CERTIFICATE. FOR VALUE RECEIVED and pursuant to that certain Stock Option Exercise Agreement dated as of_______, ____, (the “Agreement”), the undersigned hereby sells, assigns and transfers unto___________________ shares of the Common Stock, $0.0001 par value per share, of Reviva Pharmaceuticals, Inc., a Delaware corporation (the “Company”), standing in the undersigned’s name on the books of the Company represented by Certificate No(s)._ delivered herewith, and does hereby irrevocably constitute and appoint the Secretary of the Company as the undersigned’s attorney-in-fact, with full power of substitution, to transfer said stock on the books of the Company. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND ANY EXHIBITS THERETO. (Signature) (Please Print Name) (Spouse’s Signature, if any) (Please Print Spouse’s Name)

STOCK POWER AND ASSIGNMENT SEPARATE FROM STOCK CERTIFICATE. FOR VALUE RECEIVED and pursuant to that certain Stock Option Exercise Agreement No. dated as of_______of , ____, (the “Agreement”), the undersigned hereby sells, assigns and transfers unto___________________ unto , shares of the Common Stock, $0.0001 par value per share, of Reviva Pharmaceuticals, Inc.Glu Mobile Inc, a Delaware corporation (the “Company”), standing in the undersigned’s name on the books of the Company represented by Certificate No(s)._ . delivered herewith, and does hereby irrevocably constitute and appoint the Secretary of the Company as the undersigned’s attorney-in-fact, with full power of substitution, to transfer said stock on the books of the Company. THIS ASSIGNMENT MAY ONLY BE USED AS AUTHORIZED BY THE AGREEMENT AND ANY EXHIBITS THERETO. Dated: , PURCHASER (Signature) (Please Print Name) (Spouse’s Signature, if any) (Please Print Spouse’s Name)