The equivalent circuit for a typical automotive battery chargingsystem is a three-phase delta-connected source which represents thestator coils of the alternator. a) Sketch the load voltagevoltage vt(t) to scale vs time. Assume ideal diodes and that Vm islarge enough that current flows into the battery at all times(Hint: Each source and four of the diodes form a full-wave bridgerectifier) b) Determine the peak-to-peak ripple and the averageload voltage in terms of Vm. c) Determine the value of Vm needed toprovide an average charging current of 30A. d) What additional factors would need to be considered in a realistic computation of Vm?