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Consider the following unbalanced oxidation-reduction reactions in aqueous solution:
Ag+(aq) + Li(s) → Ag(s) + Li+ (aq)
Fe(s) + Na+ (aq) → Fe2+(aq) + Na(s)
K(s) + H2O(l) → KOH(aq) + H2(g)
Use the activity series to predict which of these reactions should occur (Section 4.4 in the textbook).