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A project consists of ten activities with estimated durations (in weeks) and dependences shown in the following table.
(a) What are the estimated duration of the project and the earliest and latest times for activities?
(b) If activity B needs special equipment, when should this be hired?
(c) A check on the project at week 12 shows that activity F is running two weeks late, that activity J will now take six weeks and that the equipment for B will not arrive until week 18. How does this affect the overall project duration?