A Y-connected bank of three identical 100-kVA 9000/300-V2 transformers is supplied with power directly from a large constant-voltage bus. In the short-circuit test, the recorded values on the high-voltage side for one of these transformers are V_SC = 520 I_SC = 10 A P_SC-1 phi = 1100 W (a) If this transformer bank delivers a rated load at 0.88 PF lagging at rated voltage, what is the approximate line-to-line voltage on the primary of the transformer bank? (b) What is the voltage regulation under these conditions? (c) Assume that the primary line voltage of this transformer bank is a constant 520 V, and use Matlab to plot the secondary line voltage as a function of load current for currents from no-load to full-load at power factors of 0.85 lagging, 1.0, and 0.85 leading. Include print out of the Matlab plot and code with your homework. (d) Use Matlab to plot the voltage regulation of this transformer as a function of load current for currents from no-load to full-load at power factors of 0.85 lagging, 1.0, and 0.85 leading. Include a copy of Matlab plot and code with your homework.