Given the enhancement-type NMOS transistor shown in Eigure P10.8, compute $R_1, R_2$ and $R_D$. Let $I_D=2 \mathrm{~mA}, V_t=4 \mathrm{~V}, V_{D S}=8 \mathrm{~V}, V_{D D}=16 \mathrm{~V}$, $K=0.375 \mathrm{~mA} / \mathrm{V}^2$, and total dissipated power $P_T=35 \mathrm{~mW}$.