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A construction firm from Antalya has a five activity project lined up for the coming month. They have had some difficulty getting firm estimates on the activity durations and have resorted to the three time estimates approach to plan the project. The activities and optimistic, most likely, and pessimistic estimates (in days) for each are shown in the table Predecessor 0 timistic Most Likel Pessimistic What is the likelihood that the project takes longer than 21 days to complete