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

A(7)

B(2) D(5) F(4)

G(5)

C(4) E(2)

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 path changed?
Activity Normal Time Crash Time Normal Cost Crash Cost A B C D E F G 7 2 4 5 2 4 5 6 1 3 4 1 2 4 $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 LO.1