The standard reduction potentials of ${\mathrm{Zn}}^{2+}\left|\mathrm{Zn},{\mathrm{Cu}}^{2+}\right|\mathrm{Cu}\text{ and }{\mathrm{Ag}}^{+}\mid \mathrm{Ag}$ are respectively - 0.76, 0.34 and 0.8V. The following cells were constructed.
a) $\mathrm{Zn}/{\mathrm{Zn}}^{2+}//{\mathrm{Cu}}^{2+}/\mathrm{Cu}$
b) $\mathrm{Zn}/{\mathrm{Zn}}^{2+}//{\mathrm{Ag}}^{+}/\mathrm{Ag}$
c) $\mathrm{Cu}/{\mathrm{Cu}}^{2+}//{\mathrm{Ag}}^{+}/\mathrm{Ag}$
What is the correct order of $E_{\text{cell }}^0$ of these cells?