Consider an n-channel enhancement-mode MOSFET with the following parameters: VTN = 0.4 V, W = 20 μm, L = 0.8 μm, μn = 650 cm2/V−s, tox = 200 Å, and ϵox = (3.9)(8.85×10−14) F/cm. Determine the current when the transistor is biased in the saturation region for (a) vGS = 0.8 V and (b) vGS = 1.6 V.