Question: please answer all parts 1. Building a backyard swimuning pool consists of nine major activities. The activities and their immediate predecessors are shown below. Also

please answer all parts please answer all parts 1. Building a backyard

1. Building a backyard swimuning pool consists of nine major activities. The activities and their immediate predecessors are shown below. Also the activity time estimates are provided below (assume the time estimates are in days). Activity B D E F G H I AB A,B B D Immediate Predecessor DF E, G, H Activity Optimistic Most Probable Pessimistic 5 B 2 6 5 7 D 7 9 10 2 4 6 F 1 2 3 G 5 8 10 H 6 8 10 4 5 a Construct a project network from the given information above. b. What are the critical activities? c What is the expected time to complete the project? d. What is the probability that the project can be completed in 25 or fewer days

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