Problem 2: In the following circuit, (W/L)1 = 20 and (W/L) 2 = 30. (a) What is the vIN value for vOUT = 1.5 V? Please consider the channel modulation effect and the bulk effect. (b) Calculate the small signal voltage gain (vout/vin) , input resistance (rin), and output resistance (rout) at the above biasing point.