please calculate #3 part a and b

Consider the project shown above. 1. Draw the network diagram, find the critical path and total duration of the project. Calculate the total normal cost of the project. Calculate the crash cost per week per activity. 2. Crash the project to 14 days and indicate: a. What activities were crashed and how many days each b. Total cost of the project crashed to 14 days 3. On the same network continue crashing the project to 13 days and indicate: a. What activities were crashed and how many days b. Total cost of the project crashed to 13 days 4. Crash the project to its minimum duration (the fastest it can be completed), and indicate: a. For the following paths indicate to what duration can each be crashed, and if they need to be fully crashed: - Path ACF - Path ADG - Path BEH