Activity	Immediate Predecessor(s)	Normal Time (wks)	Crash Time (wks)	Normal Cost ($)	Crash Cost ($)
A		4	1	5,000	8,000
B		5	3	8,000	10,000
C	A	1	1	4,000	4,000
D	B	6	3	6,000	12,000
E	B, C	7	6	4,000	7,000
F	D	7	6	4,000	7,000

1. You are the manager of a project to improve a billing process at your firm. Table 3 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 $1,200 per week after week 12.
   1. What is the minimum-cost schedule for this project?
   2. 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)? minimum- cost schedule derived in part A was = 15 weeks.