Lucy is in charge of planning and coordinating a project. Following is the activity information for this project.
Time (weeks)
Activity
Preceded By
Optimistic
Most Likely
Pessimistic
Lucy is in charge of planning and coordinating a project. Following is the activity information for this project.

Time (weeks)
Activity	Preceded By	Optimistic	Most Likely	Pessimistic
A	--	2	2	4
B	A	8	12	16
C	A	4	8	12
D	B,C	2	4	6
E	B	4	6	8
F	A	2	4	6
G	D	2	4	6
H	G	2	4	6
I	E,F,H	2	2	2

Requested:

(a) Construct a precedence diagram.
(b) Identify the Critical Path(s) and the expected completion time.
(c) What is the probability that the training program can be completed in 26 weeks?