2.4 Construct a network for the project below and find its expected completion time. Activity te (Weeks) Preceding activities a b c d e f g h i 3 5 3 1 3 4 2 3 1 None a a c b b, d c g, f e, h 2.5 Estimated activity times and precedences are given below: Times (days) Activity Optimistic Most likely Pessimistic Required precedence A B C D E F G H 6 8 2 6 5 5 4 2.7 7 10 3 7 5.5 7 6 3 14 12 4 8 9 9 8 3.5 A B, C B, C D, E F 2.11 Given the activities data in the table below: Activity Times (weeks) Preceding activities A B C D E F G H I 3 6 8 7 5 10 4 5 6 A B C C D, E, F G 3.2 Demand for a certain subassembly in a toy manufacturing facility at the North Pole is 96 items per eight-hour shift of elves. The following six tasks are required to produce one subassembly: Task Time required (min) Predecessor tasks a 4 b 5 a c 3 a d 2 b e 1 b,c f 5 d,e

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