Q$1.$ Consider three processed $P_1,P_2,P_3$ amiling in the ready queve at time $O$ in the order $P_1,P_2,P_3.$ Ther scrince time requireserest are $10,20$ and $30$ unit respectively. Fach procece Spende $20\%$ of its senuce time on Ilo followed by $70\%$ of its senice time on computation at CPO and last $10\%$ on to before Complosic. Assuming concument I$/$O and negligible scheduling overhead, Calculate FCFS scheduling:

$($i$)$ Average TAT

$($ii$)\%$ CPU Ideness. $L=47+$ CPv idlener $=\frac{5}{47}$