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 $1,600 per week, and penalty costs are $600 per week after week 12 Immediate Normal Cost Crash Cost Predecessor(s) Normal Time (weeks) Crash Time (weeks) ($) ($) Activity A 4 5,500 7,500 5 3 8,000 9,500 A 1 1 3,500 3,500 6 3 6,000 11,500 , 7 4,000 7,500 6,500 F 7 3,500 a. What is the minimum-cost schedule for this project? The minimum-cost schedule is 13 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)? less than using the "normal" times. (Enter your response as an integer.) The minimum-cost schedule costs $