For the cell

For the cell $\mathrm{Zn}(\mathrm{s}) \mid \mathrm{Zn}^{2+}(\mathrm{aq}) \| \mathrm{M}^{\mathrm{x}+}$ (aq) $\mid \mathrm{M}(\mathrm{s})$, different half cells and their standard electrode potentials are given below :

If $\mathrm{E}_{\mathrm{Zn}^{2+} / \mathrm{Zn}}^{0}=-0.76 \mathrm{~V}$, which cathode will give a

mximum value of $E_{\text {cell }}^{\circ}$ per electron transferred?