Prepare and submit the solution in a Ms Excel for both of the following problems

Problem 1:

a. Determine the earliest completion time for the play and the critical path from AON

b. find the probability of completing the critical path of the operatic project in 44 days c. What is the duration of the project with 90% probability?

Predecessor Activity 1 2 3 4 5 6 7 8 9 10 11 12 1 1 2 4 3 4 7 3,7 9 8 10, 11 Time (days) a b 6 10 14 0 1 2 16 20 30 3 5 7 2 3 4 7 10 13 1 2 3 0 2 4 2 2 2 2 3 4 0 1 2 1 2 3