Problem 9-12 (Algorithmic) Assume that the activity time estimates (in days) for the swimming pool construction project are as follows: A H Start Finish e G E Activity Optimistic Most Probable Pessimistic A 5 7 12 B 4 5 6 2 3 7 D 3 3 E 1 5 9 F 1 4 7 G 1 6 8 H 2 6 7 I 3 7 11 a. What are the critical activities? If necessary, round your answers to two decimal places. If your answer is zero, enter "0". Activity Expected Time Variance . D 0 0 0 0 0 0 I Illl|II|| E F G IIIII H I Earliest Latest Earliest Latest Critical Activity Start 1 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. E(T) = 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. If necessary, round your answers to two decimal places. If negative answer is required, enter the minus sign before Using the normal distribution, z = 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