2. The following processes have 4 CPU burst and 3 I/O bursts each. They are all of the same priority and they arrive in the order P1, P2, P3 at time 0. CPU I/O CPU I/O 10 CPU 10 CPU P1 P2 P3 10 10 10 10 a. Draw three Gantt charts illustrating the execution of these processes using FCFS, SJF, and RR (quantum-1t) scheduling. b. What is the turnaround time of each process for each of the scheduling algorithms in part (a)