Q3 For a three bus power system assume bus 1 is the swing with a per unit voltage of 1.0/0°, bus 2 is a PQ bus with a per unit load of 2.0+j0.5, and bus 3 is a PV bus with 1.0 per unit generation and a 1.0 voltage setpoint. The per unit line impedances are j0.1 between buses 1 and 2, j0.4 between buses 1 and 3, and j0.2 between buses 2 and 3. Using a flat start, use the Newton-Raphson approach to determine the first iteration phasor voltages at buses 2 and 3.