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[20 points] Draw the Gantt chart and compute the average waiting time for the following CPU scheduling algorithms. Here the waiting time of a process includes all the time it is in the ready list. (1) First Come First Service (FCFS). And what is the waiting time with this policy (Show your work)? (5 points) (2) Non-preemptive SJF scheduling. And what is the waiting time with this policy (Show your work)? (5 points)