5. [30 points] Consider a project with following precedence relationships and activity times. a. Calculate the expected activity duration ( t), variance for each activity, ES, EF, LS, and LF times and the slack for each activity. Show the values in a table (activity schedule). What is the critical path for the project? Show all work to earn credit. b. Using MS Project (or any other software), create a Gantt chart for the project based on ES and EF times. c. What is the probability of completing the project in 40 weeks? Show all work to earn credit. d. If the activity B can be finished in 10 weeks, D in 11 weeks, and E in 8 weeks, recalculate the expected project completion time. Show all work