Question 4: This question has two sections. Section A, and Section BSection A: A partially solved PE

Question 4: This question has two sections. Section A, and Section BSection A: A partially solved PERT problem is detailed in the table below. Times are given in weeks.ActivityPrecedingOptimisticTimeProbableTimePessimisticTimeExpectedTimeVarianceA–79141.361BA2280CA812160DA35101.361EB4680FB68100GC, F2340HD2281.000IH68162.778JG, I46142.778KE, J2250.250Which activities form the critical path? What is the estimated time of the critical path? What is the probability of completion of the project after week 40?Section B: A simple network has three activities, D, E, and F. D is an immediate predecessor of E and of F. E is an immediate predecessor of F. The activity durations are , , . Calculate the critical path and the number of days?