Q$\mathrm{.}4$Set. $($A$)$ The backend office of Bristol General Insurance Co$.$ located in Mumbai processes insurance claims. The claims process has seven activities$-$ A$,$ B$,$ C$,$ D$,$ E$,$ F$,$ and G$.$ The activity A is followed by activity B; activity B is followed by a parallel sub$-$process comprising of activities C$,$ D$,$ and E and; this sub$-$process is followed by another parallel sub$-$process comprising of activities F and G$.$

The standard output rates $($applications processed per day$)$ of the seven activities are$-40$ for activity A$,30$ for activity B$,50$ for activity C$,60$ for activity D$,20$ for activity E$,10$ for activity F$,$ and $70$ for activity G