4) Given the critical path below (A-B-C), calculate the following a. The crash cost per unit time savings for each activity. [10 points) b. The maximum total crash time savings and cost. [10 points) c. The maximum total time-savings with a $7000 budget. [10 points) Activity B Normal Time 8 days 5 days 10 days Normal Cost $8,000 $2,000 $9,000 Crash Duration 6 days 2 days 8 days Crash Cost $12,000 $9,500 $12,000