Problem 4-18 (Static) The following CPM network has estimates of the normal time in weeks listed for the activities: a. Identify the critical path. 0 A-B-D-EG O ABDFG O ACDFG O A-C-D-E-G b. What is the length of time to complete the project? c. Which activities have slack, and how much? 0 D, 1 week; E, 2 weeks. 0 B, 2 weeks; E, 2 weeks. 0 C, 1 week; E, 2 weeks. 0 C, 2 weeks; F, 3 weeks. Here is a table of normal and crash times and costs. NORMAL CRASH NORMAL CRASH ACTIVITY TIME TIME COST COST A 7 6 $7,000 $ 3,000 B 2 1 5,000 7,000 c 4 3 9,000 10,200 0 5 4 3,000 4,500 E 2 1 2,000 3,000 F 4 2 4,000 7,000 G 5 4 5,000 3,000 ' d-1. Which activities would you shorten to cut two weeks from the schedule in a rational fashion? OA,E OA,C OB,D OB,C d-2. What would be the total incremental cost? Total incremental cost d-3. Is the critical path changed? O Yes O No