consider the galvanic cell constructed with the following materials Zn electrode, Zn$($NO$3)2,$ Fe electrode, Fe$($NO$3)3$ a$.$ sketch a diagram of the galvanic cell identifying each material and labeling the cathode and anode b determine the overall cell reaction and calculate E cell c calculate delta G and K for the cell reaction at $25$ degrees celsius d$.$ calculate Ecell at $25$ degrees celcius when $[$Zn $2+]1\mathrm{.}0$ times $10$ to the $-2$ M and $[$Fe $2+]1\mathrm{.}0$ times $10$ to the $-4$th M