Use the data in the table below for the following questions.

Use both the longest path method and the ES$/$EF;LS$/$LF method for questions $($c$),($d$),$ and $($e$).$

$($C$)$ what is the expected project completion time?

$($D$)$ what are the critical activities?

$($E$)$ what are the slack values for non$-$critical activities?

$($F$)$ what is the probability that the project will be completed in $39$ weeks?

$($G$)$ what is the peobability that the project will be completed in $41$ weeks?