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please I need assistance. please let the A part be explanation Activity immediate proceedings a m b A 2 un B 4 2 A.B 4

please I need assistance. please let the A part be explanation
Activity immediate proceedings a m b A 2 un B 4 2 A.B 4 11 moo B 5 7 C 2 7 The Above data represent activities in a major construction project. A) Draw the network to represent this project or explain the precedence's if you cannot draw (5 Marks) B) Calculate the variance for each activity. (5 Marks) C) Calculate the Expected time for each activity

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