NMOS devices of a 2-input NOR gate are to be sized for TPHL = 30ps and CL = 20fF. Which of the following is the best estimate of their drawn width? (a) WDR(N) = 325 nm. (b) WDR(N) = 200 nm. (c) WDR(N) = 2.00 µm. (d) WDR(N) = 112 nm. (e) WDR(N) = 1.22 µm. (f) WDR(N) = 590 nm.