Enter the half-reactions and the balanced cell reaction for the following galvanic cells. (Enter states of matter in your answer.)
(a) Cd(s) | Cd2+(aq) || Au3+(aq) | Au(s)
(b) Fe(s) | Fe2+(aq) || Br2(aq), Br-(aq) | Pt(s)
(c) Cr(s) | Cr3+(aq) || Cu2+(aq) | Cu(s)