Suppose two processes enter the ready queue with the following properties:Process 1 has a total of 8 units of work to perform, but after every 2 units of work, it must perform 1 unit of I/O (So the completion time of this process is 12 units. Assume that there is no work to be done following the last I/O operation. Process 2 has a total of 20 units of work to perform. This process arrives just behind P1.
Show the resulting schedule for the shortest-job-first (preemptive) and the round robinalgorithms. Assume a time slice of 4 units for RR. What is the completiontime of each process under each algorithm?