Q$\mathrm{.}1)$

A system adopts a priority$-$based preemptive scheduling wherein the priority of each process has been

shown in the table below. In a recorded time$-$span, the system has seven processes, P$1,$ P$2,$ P$3,$ P$4,$ P$5,$ P$6$

and $P7$ as shown in the following table:

Assume that the dispatcher takes $2$ milliseconds for a process switch $($context switch$).$ Also assume that a

process with a higher priority number has a higher priority. At a particular instance if you encounter any

$2$ processes having the same priority then choose the one that arrived first.

A$)$ Draw a Gantt Chart $($Timing Diagram$)$ for the above data.

B$)$ Calculate the turn$-$around time for each process.

C$)$ Calculate the average turn$-$around time.