(九) Consider this set of process p, where P={p1, p2, p3, p4}, as show in Table 1.
The processes are assumed to have arrived in the order p1, p2, p3, p4. What is
the average waiting time for FCFS (first come first serve) algorithm?
(A) 9 (B)7 (C)11.25 (D) 11.5