The Operations Department of an Electronics Firm has set up the activities for installingand operationalising a new system. Table Q$1$ gives the data for this project.Table Q$1$: Project DataActivityID Description PredecessorDuration$($Days$)$A Equipment Installation $-13$B System Development $-10$C Position Recruiting $-4$D Equipment Testing A $6$E Manual Testing C $1$F Job Training B$,$ E $6$G Orientation D$,$ F $7$H System Training C $3$I System Testing H $3($a$)$ Using the data in Table Q$1,$ draw a network diagram $($A$-$o$-$N$)$ for the projectschedule showing ES$,$ EF$,$ LS$,$ LF$,$ and slack for each activity. Determine the projectduration and the critical path.$[25$ marks$]($b$)$ Draw a revised project network considering the following generalized precedencerelations that have been provided in addition to the data in Table Q$1$: Activity B can be started only after $2$ days activity A has been started. Activity E can be finished only after $1$ day activity B has been finished. Activity D can be finished only after $8$ days activity F has been started.What is the project duration and the critical path of the revised schedule?$[25$ m