Ex. Consider the following set of processes where the arrival times and CPU burst times are given in milliseconds: PROCESS ARRIVAL TIME BURST TIME PRIORITY High Low Medium 0 10 (a) Draw a Gantt chart of the process scheduling using preemptive, priority-based scheduling technique. Determine the average waiting time. (b) Draw a Gantt chart of the process scheduling using preemptive, Shortest Job First (SJF) scheduling technique. Determine the average waiting time. (c) Draw a Gantt chart of the process scheduling using FCFS scheduling. Determine the average waiting time