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. B -D E Task B D E Optimistic (a) 8 4 18 6 12 Most Likely Pessimistic (m) (b) 8 8 6 20 24 42 8 28 18 30 A What is the expected project duration? O a) 50 days Ob) 72 days O c) 53 days O d) 46 days e) 64 days