A project has the activity duration and cost information indicated in the table where the units of all times are in weeks. Note: Available crashing weeks = Normal time - crash time Extra cost for crashing = Crash cost - Normal cost a) What is the critical path and the project's total cost without any crashing? b) What is the total cost for completing this project in 40 weeks? c) Assume that there is a penalty of $6,000 per week for every week the project extends beyond 40 weeks. What is the lowest total cost for completing this project