Identify the reactions with K > 1 in the following list and, for each such reaction, identify the oxidizing agent and calculate the standard cell potential.

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(a) Cl₂(g) + 2 Br (aq) →2 Cl¯(aq) + Br₂(1) 3+ (b) MnO4 (aq) + 8 H* (aq) + 5 Ce³+ (aq) →→ 4+ 2+ 5 Ce¹+ (aq) + Mn²+ (aq) + 4 H₂O(1) 2+ 4+ (c) 2 Pb²+ (aq)→→ Pb(s) + Pb¹+ (aq) (d) 2 NO₂ (aq) + 4 H (aq) + Zn(s) → 2+ Zn²+ (aq) + 2 NO₂ (g) + 2 H₂O(1)