The Transistors in the circuit given below are characterized by: Vtn = 0.6 V, kn′ = 100 μA/V2, VA−20 V, and (W/L) for Q1 = 40. If VDD = 3.3 V, calculate the following: (a) The value of the resistor R that sets IREF to 200 μA (b) (W/L) for Q2 to set the output current Io to 800 μA