$($a$)$ What is the actual redox potential $E$ for the oxidation of ubiquinol by cytochorome $c$ in Complex III when the ratio of $Q\frac{H_2}{Q}$ is $10$ and the cyt $c\frac{F{e}^{3+}}{?}$ cyt $c(F{e}^{2+})$ is $5?$

$Q{H}_{2}Q+2H^{+}+2e^{-},E=-0\mathrm{.}045V$

$2cytc(F{e}^{3+})+2e^{-}2cytc(F{e}^{2+}),E=0\mathrm{.}235V$

$($b$)$ Calculate the $G^{\text{@}\text{'}}$ and $G$ for the reaction $(20$ points$)$

$R=8\mathrm{.}3\frac{J}{m}ol*K,T=298K$ and $F=96\mathrm{.}5k\frac{J}{V}*mol$