please show work

Kelle Carpet and Trim installs carpet in commercial offices. Peter Kelle has been very concerned with the amount of time it took to complete several recent jobs. Some of his workers are very unreliable. A list of activities and their optimistic completion time, the most likely completion time, and the pessimistic completion time (all in days) for a new contract are given in the following table: A. (1 points) Draw AON diagram of the project, including activity durations. B. ( 2 points) Based on the calculation of estimated times, what is the critical path? C. ( 2 points) What is the estimated time of the critical path? D. ( 2 points) What is the activity variance along the critical path? What is the probability of completion of the project before week 38 ? E. 3 points bonus If you solve the question using Excel OM