What is the duration of the project (in weeks)? What is the target duration of the project (after crashing the project)? By how many weeks should activity A be crashed? By how many weeks should activity B be crashed? By how many weeks should activity C be crashed? By how many weeks should activity D be crashed? By how many weeks should activity E be crashed? By how many weeks should activity F be crashed? What is the total cost of crashing the project 4 weeks (just the additional cost, not total project cost)? (Display your answer to two decimal places.)