Question 2: The Reigner Corporation is constructing a 10 -story office building at their new business location. A list of activates and their optimistic, most likely, and pessimistic completion times are given in the Table 2 for this construction project. Table 2. Reigner Corporation 10 -story Building Activities a. Develop a project network for the problem. b. Determine the expected duration a variance for each activity. c. Determine the ES, EF, LS, LF, and slack time for each activity. Also determine the total project completion time and critical path(s). d. What is the probability that this job will finish in 38 days or less