NEED HELP WITH $1-7$ if you do them all ill nake sure to give u a good review and i would be really thankful Project management with uncertainty

Below is information on various tasks that need to be completed for a movie project.

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

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

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

What is the movie completion time that yields a $90\%$ chance of completion?

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

What is the task completion time $($for each task$)$ that yields a $75\%$ chance of completion?

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

not on the critical path? Justify your answer.