A project consists of ten activities with estimated durations (in weeks) and dependences shown in the following table.
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(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?