a buck boost converter switches at 50 khz. its transistor can be modelled as 0.1 ohm when on. its diode acts as a constant 1.0 V drop. the input voltage is 12.0 V. tje ;pad os a 4 ohm resistor. what is the highest possible output voltage magnitude, and at what value duty ratio does it occur? what if anexpensive diode whith 0.5 v forward drop is used instead?