4. A balanced A-connected load has an impedance of 60 + j45/. The load is fed through a line having an impedance of 0.8 + j0.6/. The phase voltage at

the terminals of the load is 480V.The phase sequence is positive. Use VAB as the reference. a) Calculate the three phase currents of the load. b) Calculate the three line currents. c) Calculate the three line voltages at the sending end of the line.