please type your answers thank you!

4. Consider a preemptive priority processor scheduler. There are three processes, P1, P2, and P3, in the job mix, that have the following characteristics Arrival Time 0 sec Activity 8 sec CPU burst followed by 4 sec I/O burst followed by 6 sec CPU burst and quit 64 sec CPU burst and quit 2 sec CPU burst followed by 2 sec L/O burst followed by 2 sec CPU burst followed by 2 sec /O burst followed by 2 sec CPU burst followed by 2 sec IVO burst followed by 2 sec CPU burst and quit Process Priority Pl P2 P3 2 sec sec What is the turnaround time for each of P1, P2, and P3? What is the average waiting time for this job mix