A galvanic cell is constructed by wiring a zinc electrode bathed in 1.0 M Zn²⁺ (aq) to ________?
1) Ag electrode bathed in Ag+ (aq)
2) Cu electrode bathed in Cu²⁺ (aq)
3) Fe electrode bathed in Fe²⁺ (aq)
4) Pt electrode bathed in Pt2+ (aq)