Q3. 8 Points The project network and associated costs (7 in days, C in $1,000s) are shown below. ZH| E Normal Activity C C A 210 280 B 400 640 C 500 600 540 E 500 600 1100 240 r F 150 4 3 150 150 H 600 750 a. Verify that the normal duration is 22 days and that the direct cost is $3,050. b. What is the least costly way to reduce the project duration to 21 days? What is the project cost? c. What is the least costly way to reduce the duration to 20 days? What is the project cost? d. Now, what is the earliest the project can be completed and what is the least costly way of doing this? What is the project cost? 2 4 9 6 9 4 = 5 T 3 6 4 7 1 Crash Cost slape RERAER 18 3