Five batch processes arrive at almost the same time. They have estimated running times of $3$ms$,1$ms$,4$ms$,5$ms$,$ and $3$ms$.$

A$)$ Determine the average process turnaround time and the average waiting time if the OS uses Round Robin scheduler. In the calculation, assume the quantum is $1$ms$,$ ignore the overhead time such as context switch. Your answer should explain the round robin scheduler, the difference between turnaround time and waiting time and the calculation. You may use the following table for ease of your calculations. Also, you may get the waiting time by subtracting the turnaround time minus the execution time. $($draw a table like below$)$

time $12345678910111213141516$

Jobs turn

remaining

B$)$ If the processes are marked priority as $2,3,5,1$ and $4,$ respectively, with $5$ being the highest priority. Determine the average process turnaround time and the average waiting time if the OS uses Priority scheduler. In the calculation, ignore the overhead time such as context switch. Your answer should

explain the Priority scheduling first.

C$)$ If the OS uses the Shortest Job First scheduler. Determine the average process turnaround time and the average waiting time. In the calculation, ignore the overhead time such as context switch.