1. Consider the tasks, durations, and predecessor relationships in the following network. Draw the network and answer the questions that follow.

Activity	Immediate Predecessors	Optimistic (Weeks)	Most Likely (Weeks)	Pessimistic (Weeks)
A	---	4	7	10
B	A	5	8	11
C	A	8	12	16
D	B	1	2	3
E	D, C	6	8	10
F	C	2	3	4
G	F	2	2	2
H	F	6	8	10
I	E, G, H	4	8	12
J	I	1	2	3

1. Draw a project network for this problem. (5 points)

1. Fill in all the blanks in the following table. (10 points)

Note: For variance (²) in activity time, keep two decimal places.

Activity	Expected Time t (weeks)	Variance 2	ES	EF	LS	LF	Slack	Critical Path?
A
B
C
D
E
F
G
H
I
J