A 200-km, 230-kV, 60-Hz three-phase line has a positive-sequence series impedance z = 0.08 + j0.48 ohm/km and a positive sequence shunt admittance y = j3.33x10-6 mho/km. At full load, the line delivers 300 MW at 0.99 p.f. lagging and at 220 kV. Using the nominal π circuit, calculate (a) the ABCD parameters, (b) the sending-end voltage and current, and (c) the percent voltage regulation. Repeat using the short and long line models and compare your results. Problem be solved in per unit or using Volts and Amps