A 15-kVA 8000/230-V distribution transformer has an impedance referred to the primary of 80 + j300 2. The components of the excitation branch referred to the primary side are R = 350k2 and X = 70 km2. (a) If the primary voltage is 7967 V and the load impedance is Z = 3.2 +j1.5 92, what is the secondary voltage of the transformer? What is the voltage regulation of the transformer? (b) If the load is disconnected and a capacitor of-j3.5 2 is connected in its place, what is the secondary voltage of the transformer? What is its voltage regulation under these conditions?