8.1. Form Zbus for the circuit of Fig. 8.13 after removing node ③by converting the voltage source to a current source. Determine the voltages with respect to refer- ence node at each of the four other nodes when V = 1.2/0° and the load currents are ₁ = -0.1, L2 = -j0.1, 3=-j0.2, and 4j0.2, all in per unit. = j0.2 0002 4121 Load 1 j0.4 j0.6 mon 100 2 j0.5 (3 123 ILA Load 4 Load 3 122 Load 2 Reference FIGURE 8.13 Circuit diagram showing con- stant current loads supplied by an ideal voltage source. Circuit parameters are in per unit.