A construction project is broken down into the following activities: Activity Immediate Predecessor Time (days) A 4 B A 7. A 6 D B,C 2 E B,C 4. F D 1 G E,F 4. NO a. Draw the network diagram. (4 points) b. Find the critical path using the two-pass method. (4 points) c. What is the project duration? (2 points) d. How much slack does activity F have? (2 points) e. Suppose that the goal is to reduce the project duration to 15 days. Explain, step by step, which tasks to crash, and compute the resulting total cost of reducing the project duration to 15 days. (8 points) Activit Normal Time (days) Crash Time (days) Normal Cost ($) Crash Cost ($) Daily Crash Cost ($) A 4 1 100 1000 B 7 5 200 400 6 3 150 390 D 2 1 100 150 E 4 2. 500 900