Dave Fletcher was able to determine the activity times for constructing his laser scanning machine. Fletcher would like to determine ES$,$ EF$,$ LS$,$ LF$,$ and slack for each activity. The total project completion time and the critical path should also be determined. Here are the activity times:

Dave's earliest start $($ES$)$ and earliest finish $($EF$)$ are:

$\backslash$table$[[$Activity$,$ES$,$EF$],[$A$,0,5],[$B$,0,],[$C$,,9]]$