For the circuit in Figure Q1, VDD = 4 V, Iref = 0.4 mA, (W/L)1 = 1, (W/L)2 = 2, (W/L)3 = 2, (W/L)4 = 8, (W/L)5 = 24, and (W/L)6 = 6, Vpp = −1 V, and kp′ = 5 mA/V2. (a) Find Iout. (b) What are the DC voltages at nodes X and Y. (c) If |VA| = 20 V for PMOS transistors, find Rout . Figure Q1