A galvanic cell made of two half-cells. In one half-cell, a Zn electrode is bathed in a 1.0 M ZnSO4 solution. The other cell contains a 1 M HCl solution and a hydrogen electrode. The salt bridge is filled with a saturated solution of KNO3. Processes that occur at the salt bridge include which of the following? I. K+ moves into the anode half-cell. II. K+ moves into the cathode half-cell. III. NO3− moves into the anode half-cell. IV. NO3− moves into the cathode half-cell.