Part 4: Project Scheduling (CPM/PERT) (30 points) a) Using the information provided in Part 3 (i.e., AON scheduling information) and the PERT calculations that you already made, re-write the AON project network using the " 3 by-3" boxes, and perform both the forward and backwards pass, as well as determine the slack time for each activity. (27 points total) - NOTE: Please make all calculations to one decimal point. b) What is the overall project completion time? (3 points) Part 5: Project Scheduling: Uncertainty in Project Completion (10 points) Assume that the expected project completion time is what you determined from Parts 3 and 4 . Showing all formulas and calculations, please evaluate the following: a) What are the project variance and standard deviation? (2 points) b) What is the probability that the project can be completed within 38 weeks? (4 points)