Based $on$ the information above, calculate the expected time for project completion

$2$ What $is$ the probability $of$ completing the movie within $60$ weeks?

$3$ What $is$ the probability $of$ the movie being completed between $40$ and $70$ weeks?

$4$ What $is$ the movie completion time that yields $a90\%$ chance $of$ completion?

$5$ What $is$ the probability $of$ the movie taking more than $65$ weeks $to$ complete?

$6$ What $is$ the task completion time for each task that yields $a75\%$ chance $of$ completion?

$7$ Based $on$ the answer from part $6is$ there any cause for concern with respect $to$ tasks which are

not $on$ the critical path? Justify your answer.