4.5 The circuit shown in Fig. P4.5 is a model for a battery charger. Here v I is a 6-V peak sine wave, D 1 and D 2 are ideal diodes, I is a 60-mA current source, and B is a 3-V battery. Sketch and label the waveform of the battery current i B .What is its peak value?What is its average value? If the peak value of v I is reduced by 10%, what do the peak and average values of i B become?