The data regarding a project is given below.

Activity	Predecessors	Time in weeks
		Optimistic	Most probable	Pessimistic
A	-	3	3	3
B	-	1	4	7
C	-	6	7	8
D	B	3	5	7
E	A	3	6	9
F	A	6	9	12
G	B	4	6	8
H	C,D	2	4	6
I	C,D	3	5	7
J	E	2	3	4
K	F,G,H	5	8	11
L	F,G,H	3	5	7
M	I	4	6	8
N	J,K	3	5	7

1. Draw a pert network.
2. Find the expected duration and variance of the activity.
3. Find the critical path and the expected project completion time.
4. Develop an activity schedule.
5. With how many weeks would you expect the project to be completed with 96% chance?