How can the reduction potential of an electrode $\mathrm{M}\left(\mathrm{s}\right)\overline{){\mathrm{M}}^{\mathrm{n}+}}\left(\mathrm{aq}\right)$ be increased?

Find the solubility product of a saturated solution of ${\mathrm{Ag}}_2{\mathrm{CrO}}_4$ in water at $298 \mathrm{K}$ if the EMF of the cell $\mathrm{Ag}\left|{\mathrm{Ag}}^{+}\right(\mathrm{saturated} {\mathrm{Ag}}_2{\mathrm{CrO}}_4 \mathrm{solution}\left)\right|\left|{\mathrm{Ag}}^{+}\right(0.1 \mathrm{M}\left)\right|\mathrm{Ag}$ is $0.164 \mathrm{V}$ at $298 \mathrm{K}$?

In the electrochemical cell,

$\mathrm{Mg}\left(\mathrm{s}\right)\left|{\mathrm{Mg}}^{2+}\left(\mathrm{aq}\right)\Vert {\mathrm{Zn}}^{2+}\left(\mathrm{aq}\right)\right|\mathrm{Zn}\left(\mathrm{s}\right); \mathrm{E}°=+3.13 \mathrm{V}$

The correct plot of ${\mathrm{E}}_{\text{cell }}$ versus $\log \frac{\left[{\mathrm{Mg}}^{2+}\right]}{\left[{\mathrm{Zn}}^{2+}\right]}$ will be represented as

The overall cell reaction of Daniel cell is:
$\mathrm{Zn} \left(\mathrm{s}\right)+{\mathrm{Cu}}^{2+}\rightleftharpoons {\mathrm{Zn}}^{2+}+\mathrm{Cu} \left(\mathrm{s}\right); {\mathrm{E}}^0=+1.10 \mathrm{V}$

$\mathrm{Q}=\frac{\left[{\mathrm{Zn}}^{2+}\right]}{\left[{\mathrm{Cu}}^{2+}\right]}$

When ${\log }_{10}\mathrm{Q}$ is plotted on the $\mathrm{X}$-axis and ${\mathrm{E}}_{\text{cell }}$ on the $\mathrm{Y}$-axis, which of the following will correctly represent the variation?