Here is a network with the activity times shown in days:

a. Find the critical path.
b. The following table shows the normal times and the crash times, along with the associated costs for each activity.

If the project is to be shortened by four days, show which activities, in order of reduction, would be shortened and the resultingcost.

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B(3 F4) D5) G5 2) c4) ACTIVITY NORMAL TIME CRASH TIME NORMAL COST CRASH COST $7,000 5,000 9,000 3,000 2,000 4,000 5,000 $ 8,000 7,000 10,200 4,500 3,000 7,000 8,000