The critical path on a project has 4 tasks, a, b, c, and d. the allowable amounts of crashing and the costs for crashing are given as task #days allowed $$$/day a 2 30 b 3 50 c 1 25 d 2 15 to crash the project by 6 days, a should be crashed by days. b should be crashed by days. c should be crashed by 1 days. d should be crashed by days. the order of crashing these will be . the total cost of crashing by 6 days will be