460 V rms 3 phase full wave controlled rectifier feeds an inductive load. The supply voltage has a frequency of 50 Hz. If thyristors are considered ideal; a) Draw the voltage on the load when a = 25. b) When a = 15, draw the voltage seen on the load with the FWD diode parallel to the load. c) Draw the voltage seen on the load when a = 75. d) when a = 90, draw the voltage seen on the load with the FWD diode parallel to the load.