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.

Under serial computing, $($All time are in s$.)$

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

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

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

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

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

$($f$)$ What is the CPU utilization $($Processor utilization$)$ for job J $?$

Note for $($f$)$ : Use an integer value to express the percentage for the CPU utilization. E$.$g$.$ for a $12\%$ you type $12$ not $\mathrm{.}12$ nor $0\mathrm{.}12$