Three single phase transformers are used to form a three phase transformer bank \text { - } 138 \mathrm{kV}(\Lambda) / 120 \mathrm{kV}(\mathrm{Y}) Source is a 120kV transmission line. ●Load side is a 12 MVA load at 0.8 Lagging PF. a. Turns ratio of each transformer. b. Line current at the 120 kV side.