A job J consists of three tasks A$,$ B and C$.$ All three tasks are CPU bound. Job J completes when its last task completes its execution.

Task A arrives at t$=0$s$,$ B arrives at t$=19$s and C arrives at t$=25$s$.$ The service time $($aka CPU time$)$ for A is $20$s$,$ for B $10$s$,$ and for C $10$s$.$The CPU is available at t$=0$s and there are no other task $($or jobs$)$ other than the ones introduced in the system.

A multitasking system is utilized with a Quantum of $5$s starting at t$=0$s; context switch time is $0$s$.$ First quantum $[0$s$,5$s$]$ is immediately assigned to task A to assist you.

$($a$)$ What is the turnaround time Tr$($A$)?$

$($b$)$ What is the turnaround time Tr$($B$)?$

$($c$)$ What is the turnaround time Tr$($C$)?$

$($d$)$ What is the response time R$($B$)$ for B $?$

$($e$)$ What is the respnse time R$($C$)$ for C$?$

$($f$)$ What is the cpu utilization for J $?$