Consider the circuit shown below. Use the following parameters for your calculations. VDD = −VSS = 5 V, Kn = 0, 7 mA/V2, VTN = 0, 8 Vλ = 0, R1 = 237 kΩ, R2 = 63 kΩ, RD = 3 kΩ, RS = 1 kΩ, a-Please draw AC equivalent circuit and small signal equivalent circuit. (6 points) b-Find VGS (6 points) c-Find operating point Current loa and Voltage VDSQ (8 points) d-Find Av Voltage Gain (5 points)