target completion week

You are the project manager of the software installation project in Table. You would like to find the minimum-cost schedule for your project. There is a $1,000-per-week penalty for each week the project is delayed beyond week 25. In addition, your project team determined that indirect project costs are $2,500 per week.
a. What would be your target completion week?
b. How much would you save in total project costs with your schedule?
DATA FOR SOFTWARE INSTALLATION PROJECT
Activity
Normal Time (days)
Normal Cost ($)
Crash Time (days)
Crash Cost ($)
Immediate Predecessor($)
A
–
5
2,000
3
4,000
B
–
8
5,000
7
8,000
C
–
10
10,000
8
12,000
D
A, B
4
3,000
3
7,000
E
B
3
4,000
2
5,000
F
D
9
8,000
6
14,000
G
E, F
2
2,000
2
2,000
H
G
8
6,000
5
9,000
I
C,F
9
7,000
7
15,000