Problem 1. NMOS large-signal model (Gray: 1.15) For a NMOS transistor (A = 0.1V-¹): (a) Sketch the ID vs VDs characteristics for VDs from 0V to 3V and VGs = 0.5V and 1.5V. Assume VSB OV. (b) Sketch the ID vs VGs characteristics for VDS 2V and VGS from 0V to 3V. Assume VSBOV and 1V.