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You are the manager of a project to improve a billing process at your firm. The table below contains the data you will need to conduct a cost analysis of the project. Indirect costs are $1,000 per week, and penalty costs are $800 per week after week 12. Normal Cost Immediate Predecessor(s) Activity A B IMO OWL Normal Time (weeks) Crash Time (weeks) 4 1 5 3 1 1 6 3 7 6 7 A B B, C D Crash Cost ($) 7,500 9,500 4,500 11,500 7,500 7,500 4,500 8,500 4,500 6,000 3,500 4,000 a. What is the minimum-cost schedule for this project? The minimum-cost schedule is 16 weeks. (Enter your response as an integer.) b. What is the difference in total project costs between the earliest completion time of the project using "normal" times and the minimum-cost schedule you derived in part (a)? The minimum-cost schedule costs $ less than using the "normal" times. (Enter your response as an integer.)