Suppose the galvanic cell sketched below is powered by the following reaction: Mg(s)+PdSO4(aq) MgSO4(aq)+Pd(s) e- E1 E2 sà S2 Write a balanced equation for the half-reaction that happens at the cathode of this cell. Write a balanced equation for the half-reaction that happens at the anode of this cell. Of what substance is El made?