1. The probabilistic activity time estimates for the CPM/PERT network shown below are tabulated. (15 Points) 3 8 LS ES LF EF Slack Expected Time Time estimates a m b Activity Variance Activity 1 1 2 6 2 1 3 5 3 3 5 10 4 3 6 14 5 2 4 9 6 2 3 7 7 1 2 3 8 1 3 5 Using the above table to tabulate all results, determine the following: a. Expected Activity times (2 points) b. Activity Variances (2 points) c. Redraw the network in order to determine the earliest and latest start and finish times (1 point) d. LS, ES, LF, EF for each activity (4 points) Slack for each activity (2 points) Formulas: f. Identify the critical path (1 point) t= (a+4m+b)/6 g. Project duration (1 point) h. Project variance (1 points) o2=((b-a)/6)2 i. Project standard deviation (1 points) e