Problem 7 For the MOSFET amplifier circuit shown below, answer the following questions. Assume Vt = 2 V, kn′(W/L) = 0.5 mA/V2. (1) Perform DC analysis and find ID and VGS. (2) Perform ac analysis and find voltage gain (vo/vi). (3) Find the maximum value for vi to remain the MOSFET in saturation region.