Consider the following set of processes, with the length of the CPU burst given in The processes are assumed to have arrived in the order P1, P2, P3, P4, P5, all at time milliseconds: 0.

a) Draw four Gantt charts that illustrate the execution of these processes using the following scheduling algorithms: FCFS, SJF, nonpreemptive priority (a larger priority number implies a higher priority), and RR (quantum = 2)