Figure 2 shows a dc-dc power converter known as a buck-boost converter. You may assume that Vin is positive, and that the input and output capacitors are large (i.e. they have small ripple). The transistor and diodes are ideal. The input voltage is 20 V, the output power is 30 W, and the converter operates at a switching frequency of 75 kHz, with a duty ratio of 0.75 (i.e. the transistor is on for 75% of the switching period). The inductor L has value 1 mH