4. (15%) Consider the yoltage amplifier of Fig. 4 with a MOSFET specified to have Vt= 1.5 V,
(WIL) = 0.5 mArV2, andλ = 0.02. The coupling capacitors C can block DC component and
pass AC component. Calculate (a) the small-signal voltage gain (b) its input resistance , and (O)
the largest allowable input signal. (5%*3)