The following is a table of activities associated with a project at Rafay Ishfag's software firm in Chicago, their durations what activities each must precede and the crash cost to reduce duration per week Duration Crash Activity (weeks) Precedes Cost/Week A (start) BC $380 B $130 SENN $240 $150 F rend $400 Suppose that Rafay is only given 7 weeks (instead of 9) to complete the project. By how many weeks should each activity be crashed in order to meet the deadline? Assume that you can crash an activity down to 0 weeks duration Each Activity Activity Should be Reduced BY (weeks) 0 week's 1 weekis 2 weekis D' Week(s) 0 week(s) What is the total crashing cost? $ 35 (Enter your response as a whole number