23. Given the following project network where the times are In weeks and the costs In 3. Task Normal Crash Normal Crash IP Time Time Cost Cost A 6 4 8000 14000 - B 1 1 4000 4000 A C 8 4 8000 24000 - D 5 3 10000 24000 C E 9 5 10000 1 8000 B.C F 12 6 20000 36000 D.E G 3 2 10000 18000 F Determine the critical time I II Identify the critical path(s). What is the minimum time that this project can be completed? What is the total cost to achieve the answer in part c? What is the optimal system crash time assuming there is a $10,000 per week penalty for every week over 20 weeks? What specic tasks are crashed and by how much? What is the total system cost associated with the answer in part f? 959.1in0 e. If we are at 20, the cost will be 70,000+35000=105,000 if we are at 21, the cost will be 28,000+70,000+ 10,000=108,000 If we are at 22, the cost will be 24,000+70,000+20,000= 114,000 Penalty is more expensive than crashing, thus we should crash to 20 a. Aby1,be2, Eby4, and Fby6 b. Total cost will be 105,000