a. In the given circuit, the MOSFET operates based on the model iD = K(vGS − Vt)^2, as long as vds ≥ vGS−VT, where K is 1.16 milli-siemens per volt, and VT = 0.6 volts. The resistances R1 and R2 are 590 kilo-ohms and 100 kilo-ohms, respectively. What is the maximum value of RD for which the device is in saturation? Provide your answer in kilo-ohms. b. In the given circuit, assuming RD = 4 5 kilo-ohms, what is the maximum current iD that can flow through the device while ensuring the device remains in saturation? For this question, disregard the earlier values of R1 and R2.