asked this question before but the answer doesnt add up please see pictures below. Please review and let me know if its correct or what edits need to be made

File Home LISEL Page Layout PUTUS NEVIEW Te Wayuu WORLU 42 > A B C D E F G H M1-Q6 Your hospital has applied for certification as a level 1 stroke center. It is critical that the following project is completed before the next Joint Commission survey in 18 weeks. Project activity times are listed in the table below. Crash the project using the marginal cost analysis method. What is the extra cost incurred? A F G Start End C D E t_Red Activity A B t. (weeks) 6 t. (weeks) 2 4 7 3 4 9 6 3 cn $600 $200 $500 $800 $1,600 $200 $400 $1,400 $600 $950 $1,200 $2,800 $400 $750 S $800 $400 $450 $400 $1,200 $200 $350 D 2 1 1 3 E 8 5 4 F 5 1 G 3 1 4 normal cost $4,300 B E F G H K D Which path is critical Critical Paths Period Start-A-B-F- G-End 22 weeks Start-C-D-F- G-End 20 weeks Start-C-D-E- End 19 weeks Task to Crash S t_Red 1 week 3 weeks 2 weeks New Costs and Periods after first crashing Activity t. (weeks) cn t. (weeks) 6 $600 1 B 7 $200 3 8 $500 2 D 2 $800 0 E 8 $1,600 0 F 1 $200 0 G 4 $400 0 Cost $4,084 C $200 $300 $300 $0 $0 $0 $0 0 $0 $0 $0 $0 $0 $0 $0 0 0 0 Repeat above until reaching desired period