Q4) In the following MOSFET transistor, a) State the operation region of the transistor (proof whether it is in cutt-off saturation or triod region) b) Find the value of R and the dc voltage VD to obtain a current ID = 100 μA. Let the MOSFET transistor have Vt = 0.65 V, μnCox = 200 μA/V2, L = 0, 85 μm and W = 5 μm. Neglect the channel length modulation effect (assume λ = 0)