The ABC company is planning to implement a new information system for its customer. The following table shows the relati

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The ABC company is planning to implement a new information
system for its customer. The following table shows the relationship
among the project activities. The customer only allows ABC company
to complete the project in 35 weeks, otherwise, they will charge
ABC company $30,000.
Activity
Immediate predecessor
Time estimates (weeks)
Optimistic
Most likely
Pessimistic
A
--
1
2
3
B
--
2
5
8
C
--
1
3
5
D
A
4
10
25
E
A
3
7
12
F
B
10
15
25
G
C
5
9
14
H
D, E
2
3
7
I
D, E, F
1
4
6
J
D, E, F, G
2
5
10
K
H, I, J
2
2
2