Problem 13-13 (Algorithmic) Suppose that the following estimates of activity times (in weeks) were provided for the network shown below: Activity Optimistic Most Probable Pessimistic A 4 6 8 B 2.5 4.5 5.5 C 5 6.5 8 D 4 5.5 8 E 6.5 7.5 9 F 2 3.5 5 G 7 9 12 H 5 6 13) What is the probability that the project will be completed. If required, round your answers to four decimal places. a. Within 20 weeks? :1 b. Within 22.5 weeks? [:1 c. Within 25 weeks