a) What is the probability that this project will be delayed?

b) What is the probability that activity F alone will take between 44 and 46 days?

show work please:)

The following project has three independent paths as shown in the project network diagram. The deadline to complete this project is 46 days. A B Activity Optimistic Time (days) Most Likely Time (days) Pessimistic Expected Variance Time Time of (days) (days) Activity D Start End A 10 16 28 11-13 140 110 B 20 28 42 E F C 18 30 42 D 15 15 15 E 1 2 3 F. 42 45 48