Use the information below to answer the following question: The project manager is using PERT to determine what the probability is of completing the following project for various durations. Durations are in days. Optimistic Most Likely Pessimistic Task (a) (m) (b) B D A 8 8 8 E B 4 6 20 A 18 24 42 D 6 8 28 C E 12 18 30 What is the probability of completing the project in 50 days or less? a) 2.28% b) 27.43% c) 78.81% d) 15.87% e) 99.94%