Chapter 13, Problem 13.18PAE

Based on the cell potential measured for the cells

   $\begin{array}{l}\text{Co}\left(\text{s}\right)|{\text{Co}}^{\text{2+}}\left(\text{aq}\right)\Vert {\text{Cu}}^{\text{2+}}\left(\text{aq}\right)|\text{Cu}\left(\text{s}\right)E°=0.614\text{V}\\ \text{Fe}\left(\text{s}\right)|{\text{Fe}}^{\text{2+}}\left(\text{aq}\right)\Vert {\text{Cu}}^{\text{2+}}\left(\text{aq}\right)|\text{Cu}\left(\text{s}\right)E°=0.777\text{V}\end{array}$

what potential should you expect to find for the following cell?

   $\text{Fe}\left(\text{s}\right)|{\text{Fe}}^{\text{2+}}\left(\text{aq}\right)\Vert {\text{Co}}^{\text{2+}}\left(\text{aq}\right)|\text{Co}\left(\text{s}\right)$