A60-hz single-phase transformer with capacity of 150 kva has the following parameters: rp = 0.35 ω rs = 0.002 ω rc = 5.2 kω xp = 0.5 ω xs = 0.008 ω xm = 1.1 kω the primary transformer voltage is 2.8 kv and the secondary is 230 v. the transformer is connected to a variable load (0 to 300 kw) with a lagging power factor of 0.83 and a load voltage equal to the rated transformer secondary. determine: (a) the total input impedance of the transformer when the secondary is shorted; and (b) the input current, voltage, power and power factor at full load (150 kw). (c) plot the voltage regulation versus load, and determine the load that produces 5% regulation.