please help with c, d1, d2, d3

The following CPM network has estimates of the normal time in weeks listed for the activities: a. Identify the critical path. A-C-D-E-GA-C-D-F-GA-B-D-F-GA-B-D-E-G b. What is the length of time to complete the project? c. Which activities have slack, and how much? C, 1 week; E, 2 weeks. C, 2 weeks; F,3 weeks. D, 1 week; E,2 weeks. B, 2 weeks; E,2 weeks. Here is a table of normal and crash times and costs. d-1. Which activities would you shorten to cut two weeks from the schedule in a rational fashion? B,C B, D A, E A, C d.1. Which activities would you shorten to cut two weeks from the schedule in a rational fashion? B,C B, D A, E A, C d.2. What would be the total incremental cost? d-3. Is the critical path changed? Yes No