Index Immediate Predecessors Optimistic (In month) 4 4 A B D E F A A B.C CD Most Likely Pessimistic (In month) (In month) 7 10 9 14 7 8 9 17 5 5 6 7 4 6 3 4 a) (3 points) Draw a network Diagram. Use AON (Activity on Node) method. b) (6 points) Calculate the expected time and the variance for each activity. Show all your work Index Expected time Variance A B D E F UA c) (8 points) Calculate ES/EF/LS/LF/slack values for all activities (fill in the blanks). Based on the calculation of estimated times, what is the critical path? What is the expected project completion time? What is the project variance? Show all your work Activity Early Early Start Finish Late Start Late Finish Slack A B D E F Critical Path: u = E[7] = o2 = Var[T] = = = (3 points) What is the project completion time at 95%? Use the standard normal table. Show all your work