2. Given the following activities and precedences, construct the AOA or AON diagrams: Given the estimated activity times below and the network in Problem 2 above: Find the followings: a. The probability of completing the project (based on critical path) in 21 days (or less) b. The probability of completing the two paths of A-D-G and B-F-H on time. c. The number of days required to assure a 92.5 percent chance of completing the project (based on critical path)