The following table provides data for a project. Use the data to answer the following questions Activity Immediate Time Estimates (weeks) Predecessor Optimistic Most Likely Pessimistic Expected Variance A 2 5 14 B 8 11 14 A 5 7 9 D A 6 9 12 D.B 1 3 5 b. What is the critical path? What is the expected completion time? What is the variance of the project completion time? (Complete the expected task time and variance of time calculations.) I Name: c. Which activities currently can be delayed without delaying the entire project and what are their corresponding slack times? d. The customer wants the project to be completed in 15 weeks. What is the probability that the project will be completed in 15 weeks? e. The project manager would like to complete the project at least in 21 weeks. What is the probability that the project will be completed in 21 weeks