The reaction $2\text{Fe}^{3+}(aq) + \text{Cu}(s) \rightarrow 2\text{Fe}^{2+}(aq) + \text{Cu}^{2+}(aq)$ is run in a cell. Use $E^\circ(\text{Fe}^{3+}/\text{Fe}^{2+}) = 0.77\ \text{V}$ and $E^\circ(\text{Cu}^{2+}/\text{Cu}) = 0.34\ \text{V}$. What is $\Delta G^\circ$ for the reaction as written?