$Cu/CuSO_4\parallel AgNO_3/Ag$, Find $K_{eq}$ for the reaction. Given : $E^o_{Cu^{+2}/Cu}=0.34, E^o_{Ag^+/Ag}=0.8, T=298K$

Question

$\begin{array}{1 1}(a)\;10^{42.71}&(b)\;10^{39.62}\\(c)\;20^{-42.71}&(d)\;20^{-39.62}\end{array}$