Question 1 (5 points) Processes P1,P2, and P3 arrive at times: 1, 10, and 15 respectively. The CPU burst and the priority assigned to each process are: P1: 8 2 P2: 5 5 P3: 8 4 For RR scheduling, (a) complete the execution diagram, (b) calculate the average waiting time, c) Calculate CPU utilization for the system. Use a time quantum of 4 time units. Show all your work. You may draw the diagram by hand then immediately send the picture with an appropriate file name