Write a balanced chemical equation for the overall cell reaction represented as:

Question

a) Ag(s)|Ag^+(aq)||Sn^4+(aq), Sn^2+(aq)|Pt(s)
b) Al(s)|Al^3+(aq)||Cu^2+(aq)|Cu(s)
c) Pt(s)|Fe^2+(aq), Fe^3+(aq)||MnO4^-(aq),Mn^2+(aq)|Pt(s)