Three electrolytic cells A, B and C containing electrolytes ZnSO₄, AgNO₃ and CuSO₄ respectively were connected in series. A steady current of 1.50 ampere was passed through them until 1.45 g of Ag were deposited at the cathode of cell B. How long did the current flow? What mass of copper and zinc were deposited ? (At. wts. of Cu = 63.5, Zn = 65.3, Ag = 108)