4. (%25) Consider the following set of jobs to be scheduled for execution on a single CPU system (a) Draw a Gantt chart showing preemptive SRJF scheduling. (b) Calculate and show the average waiting time turnaround time. (C) Now assume that, process P2 used the CPU for (5ms, 4ms, 11ms) in its 3 previous executions. What will be the next CPU burst prediction for P2 if the system uses exponential averaging with equal weights for most recent past and for the earlier cpu usages. mell walk1 Process PI P2 P3 P4 P5 Arrival time 2 6 7 9 14 CPU time 8 6 1 3 5