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: ActivityTime $($weeks$)$Immediate Predecessor$($s$)$ActivityTime $($weeks$)$Immediate Predecessor$($s$)$A$7$E$5$BB$8$F$6$BC$3$AG$9$C$,$ ED$1$AH$6$D $,$ F