please show any and all work in excel

The project manager of a task force planning the construction of a domed stadium had hoped to be able to complete construction prior to the start of the next college football season. After reviewing construction time estimates, it now appears that a certain amount of crashing will be needed to ensure project completion before the season opener. Given the following time and cost estimates, determine a minimum-cost crashing schedule that will shave five weeks off the project length. Note: No activity can be crashed more than two weeks. Immediate Predecessor Activity A B A CRASHING COSTS First Week Second Week $15,000 $20,000 10,000 10,000 5,000 5,000 20,000 21,000 16,000 18,000 12,000 15,000 24,000 24,000 D C C Normal Time (weeks) 12 14 10 17 18 12 15 8 7 12 9 E F G H I J K M N P End C D E 30,000 25,000 10,000 25,000 10,000 F I B G H H, ] K, M, N, P 3 11 40,000 20,000 8 20,000 Crash schedule: (1 week each) Week 1 Week 2 Week 3 Week 4 Week 5