In the button cell, widely used in watches, the following reaction takes place
Zn(s)+Ag₂O(s)+H₂O→Zn²⁺(aq)+2Ag(s)+2OH−(aq)

Determine E∘ and ΔG∘ for the reaction.
(Given : E∘Ag+/Ag=+0.80V,E∘Zn²⁺/Zn=−0.76V