The project network and associated costs (T in days, C in $1,000s) are shown below. D End Start С B 타 Activity Normal T₁ Ca Ce 4 210 280 9 400 640 6 500 600 9 540 600 4 500 1100 200 5 150 4 240 90 3 150 3 150 7 600 6 750 150 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?
