For the PMOS differential amplifier shown in Fig. 1, let Vp = -0.8 V and k, W/L-4 mA/V. Neglect channel length modulation. (a) For Vg₁ = V2 = 0 V, find |Vol and VSG for each of Q, and Q₂. Also find Vs, Vol, and Voz. (b) If the current source requires a minimum voltage of 0.4 V, find the input common-mode range. +2.5 V GIO DIO 4kf ww -2.5 V Fig. 1 0.5 mA 4ΚΩ 2 -O12