2. Consider the following project. Time Estimates a m Immediate b Activity Predecessor(s) (optimistic) (most likely) (pessimistic) A 1 3 8 B A 7 7 19 A 2 4. 6 B, C 3 5 7 E C 3 4 5 D, E 4 6 8 Do QIU > OOO OO (a) Compute (2 pts) the expected duration of each activity and (2 pts) the variance of the duration of each activity. Round your answers to two decimal places. Activity Expected Time Variance A B C D E F [1 PT] Draw the activity-on-node network. (c) (2 PTS) Identify the critical path. (d) (2 PTS) Compute the expected project completion time. Ro one decimal place. e) [2 PTS] Compute the variance of the project completion time. Round your answer to two decimal places. f) (2 PTS) What is the probability of finishing the project in 26 weeks? Write down the Excel formula you would use to compute this probability. I 4 PTS] Consider the following project. What should you do to crash the duration of he project by 2 weeks at the minimum possible cost? A B START FINISH F G