Refer to the circuit in Figure Q1 below: R VDD M R W VinM Figure Q1 Vout a) Investigate the performance of the amplifier circuit in Figure Q1 by illustrating the behavior of Vout versus Vin. Label the important transition point as Vin grow from 0 V to VDD and state the mode of both MOSFET in every region. b) Outline the small signal model for this circuit. Neglect the channel length modulation and body effect. c) From your small signal model, deduce the expression of voltage gain Vout/Vin