2. (20) Assume $V_{DD} = V_{SS} = 5V$, $I_D = 1mA$, $k_n' = 4mA/V^2$, $(W/L)_1 = (W/L)_2 = 2$, $V_{th} = 0.6V$, and $\lambda = 0$.
1) (10) What is the lowest value allowed for $V_{CM, min}$?
2) (10) What is the highest value allowed for $V_{CM, max}$?