List of processes and their corresponding burst time are given below in the table. Process P1 P2 P3 P4 Burst Time 2 6 3 21 Arrival Time 2 1 0 3 Priority 3 4 (high) 1 (low) 2 Question 1:1 18 a) Show the execution of these processes in Gantt Chart using preemptive Priority Scheduling CPU Scheduling Algorithm. (3 Marks) b) Calculate the average waiting time of all processes. (5 Marks) Question 2 18 a) Show the execution of these processes in Gantt Chart using non preemptive Priority Scheduling CPU Scheduling Algorithm. (3 Marks) b) Calculate the average waiting time of all processes