Assume we have three processes PP$1,$ PP$2$ and PP$3$ in Central processing unit $($CPU$)$

scheduling and the execution of all the three processes are $7$ ms$,6$ ms$,3$ms$,$ respectively.

These processes enter into the ready state consecutively together in the order of pP$1,$ PP$2,$

and PP$3.$

Assume that no waiting time is there due to the I$/$O and round scheduling with the time slots

of $3$ miliseconds.

Calculate:$-$

a$.$ The minimum required waiting time $($ms$).$

b$.$ The minimum required turnaround time$($ms$).$

c$.$ Operating frequency$($Hz$).($Give your answer upto two decimal Place$)$