Chemistry - Electrochemistry Question with Solution | TestHub

${\mathrm{FeO}}_4^{2-}\stackrel{+2.0\mathrm{v}}{\to }{\mathrm{Fe}}^{3+}\stackrel{0.8\mathrm{v}}{\to }{\mathrm{Fe}}^{2+}\stackrel{-0.5\mathrm{v}}{\to }{\mathrm{Fe}}^0$
In the above diagram, the standard electrode potentials are given in volts (over the arrow).
The value of ${\mathrm{E}}_{{\mathrm{FeO}}_4^{2-}/{\mathrm{Fe}}^{2+}}^{\mathrm{O}}$ is