a) Based on the given information regarding the activities for the project, the project completion date = weeks. b) To reduce the duration of the project to 10 weeks at the least cost, the following is the order of what needs to be followed while crashing the activities: The first activity to crash is by 2 weeks at a per week crashing cost of dollars. Next, one should crash activity D and activity by 2 weeks for an additional total per week crashing cost of dollars. c) New requirements are to reduce the project to 7 weeks. Continuing to crash the activities from 10 weeks based on the above crashing already completed, the following is the order for crashing: Next activity to crash in order is by 2 weeks at a per week crashing cost of dollars. Next, one should crash activity and activity E by 1 week at a total per week crashing cost of dollars