Consider the diff-amp in Figure P11.68. The PMOS parameters are: Kp = 80 μA/V2, λp = 0.02...

Consider the diff-amp in Figure P11.68. The PMOS parameters are: Kp = 80 μA/V2, λp = 0.02 V−1, VTP = −2 V. The NMOS parameters are: Kn = 80 μ/V2, λn = 0.015 V−1, VTN = +2 V. (a) Determine the open-circuit differential-mode voltage gain, (b) Compare this value to the gain obtained when R1 = 0. (c) What is the output resistance of the diff-amp for parts (a) and (b)?