1Consider the following set of processes, with the arrival times and the length of the CPU- burst time are given in milliseconds Process Arrival Time Burst Time 4 4 (i) Draw a Gantt chart to illustrate the execution of these processes using Round Robin with time quantum 3ms (ii) Calculate the average waiting time (iii) Calculate the average turnaround time. (2 marks) (2 marks) (1 mark) On a system using 4 level feedback queues, a totally CPU-bound process requires 25 milliseconds to execute. If the first queue uses a time quantum of 16ms, and at each lower level the time quantum reduces by half; (i) What is the objective of this scheduling policy? (1) How many times will the job be interrupted? (iii)If the context switch takes 2 milliseconds, what is the turnaround time of the (2 marks) (1 mark) process? (2 marks)