The following CPM network has estimates of the normal time in weeks listed for the activities:

a. Identify the critical path.
b. What is the length of time to complete the project?
c. Which activities have slack, and how much?
d. Here is a table of normal and crash times and costs. Which activities would you shorten to cut two weeks from the schedule in a rational fashion? What would be the incremental cost? Is the critical pathchanged?

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NORMAL TIME CRASH TIME NORMAL CRASH CosT ITY 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