Problem 9-12 (Algorithmic) Assume that the activity time estimates (in days) for the swimming pool construction project are as follows: H Start Finish E Activity Optimistic Most Probable Pessimistic A 5 7 12 B 3 5 7 C 1 3 8 D 9 10 11 E 2 6 10 F 3 6 9 G 2 7 9 H 2 6 7 a. What are the critical activities? If necessary, round your answers to two decimal places. If your answer is zero, enter "o". Activity Expected Time Variance A B D E F H I Earliest Latest Earliest Latest Critical Activity Start Start Finish Finish Slack Activity A B D E F G H I Critical Path: b. What is the expected time to complete the project? If necessary, round your answer to two decimal places. EG) = days C. Based only on critical path, what is the estimated probability that the project can be completed in 25 or fewer days? Variance If necessary, round your answers to two decimal places. Using the normal distribution, z = . If necessary, round your answers to two decimal places. If negative answer is required, enter the minus sign before the number. Probability of 25 days or less is If necessary, round your answers to four decimal places. Note: Use Appendix B to identify the probability