Three single-phase transformers are used to form a three-phase transformer bank rated 13.8 kV(Δ)/120kV(Y). One side of the transformer bank is connected to a 120 kV transmission line, and the
other side is connected to a three-phase load of 12MVA at 0.8 power factor lagging. Determine the turns ratio of each transformer and the line current at the 120 kV side.