PERTA: The table below describe a project to lay a new INTERNET system across the university campus (days): Activity Optimistic Most Likely Pessimistic Immediate Predecessor(s) 8 6 3 10 12 9 4 6 A B D E F G H ! J K L 10 7 3 20 7 10 7 IS 11 9 6 30 8 11 10 16 13 8 8 B.DE D.B.E F. F GH 14 10 6 4 , 2 GH a. Draw the network diagram b. Determine the critical path. c. Record the critical path duration. d. Determine the probability that the project will be completed within 70 days. e. Determine the probability that the project will be completed within 65 days