The project network and associated costs (T in days, C in $1,000s) are shown below.

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?

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Start A Normal D H C G-B B E G Crash End Tn T Cc Cost slope 210 400 500 540 500 150 150 7 600 36491436 280 70 640 80 600 50 7 600 30 1100 200 240 90 3 150 6 750 150 Activity 54969453N ABCDEFGH