a) Based on the given information regarding the activities for the project, the project completion date =14 weeks. b) For reducing the duration of the project to 10 weeks at the least cost, following is the order of that needs to be followed while crashing the activities: The first activity to crash is by 2 weeks at a per week crashing cost of 75 dollars. Next, one should crash activity D and activity by 2 weeks each at a total per week crashing cost of 125 dollars. 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 650 dollars. Total cost of crashing the project to 7 weeks = dollars