$($Bonus$)3.$ A system has two periodic tasks A $(4,1)$ and B $(6,2),$ and a deferrable server SD

$(5,2).$ Two aperiodic jobs are released at $2$ and $12$ with execution time $3$ and $2\mathrm{.}5$

respectively. Apply Earliest Deadline First algorithm to schedule periodic jobs.

a$)$ Draw Gantt charts to illustrate the schedules of periodic and aperiodic jobs, as well as

the polling server$$s budget.

b$)$ Calculate the response times for the two aperiodic jobs.