Solve the following problem:
a. Determine the mathematical expressions for iL and vL following the closing of the switch in Fig.
b. Determine iL and vL after two time constants of the storage phase.
c. Write the mathematical expressions for the current iL and the voltage vL if the switch is opened at the instant defined by part (b).
d. Sketch the waveforms of iL and vL for parts (a) and (c).
