Calculate the ΔG° and equilibrium constant of the reaction at 27°C
$$\begin{gathered} \mathrm{Mg}+{\mathrm{Cu}}^{+2} \rightleftharpoons {\mathrm{Mg}}^{+2}+\mathrm{Cu} \\ {\mathrm{E}}_{{\mathrm{Mg}}^{2+}/\mathrm{Mg}}^0=2.37 \mathrm{V}, {\mathrm{E}}_{{\mathrm{Cu}}^{2+}/\mathrm{Cu}}^0=+0.34 \mathrm{V} \end{gathered}$$