4. The aim of processor scheduling is to assign processes to be executed by the processor or processors over time, in a way that meets system objectives, such as response time, throughput, and processor efficiency. Consider the scheduling of the following set of processes: Process A B D E Table 1: Process Table Arrival Time Service Time 0 3 3 2 1 5 9 6 12 2 Compute and compare the turnaround time (TAT) and normalized turnaround time (NTAT) of the processes using Round Robin (t=2), Shortest Process Next (SPN) and Shortest Remaining Time (SRT) scheduling policy. (15 marks)