Consider a scheduling simulation involving 20 processes, each running for a total duration of 1000ms spread over separate CPU bursts ranging uniformly in duration from 25ms to 75ms. Context switch time (CST) is 2ms. The following four scheduling policies are used in the simulation (not in order): FCFS RR, q=50ms SJF (non-preemptive) PSJE The following are the results of the simulation: Policy #1 #2 #3 #4 Total CST 996 824 1206 824 Avg. wait time 12166.79 16865.23 17497.24 12188.63 Std dev of wait time 232.27 26.14 14.91 229.51 Which policies correspond to #1, #2, #3, and #4 in the table? %231 A. FCFS #232 B. SJE #3 C. PSJE v #4 D. RR, q=50ms