OPERATIONS RESEARCH

1. Adrian n Ray a research and development company has a project which has a list of tasks to be performed whose time estimates are given in the table as follows.

I Activity j	Activity	T0	tm	tp
1-2	A	4	6	8
1-3	B	2	3	10
1-4	C	6	8	16
2-4	D	1	2	3
3-4	E	6	7	8
3-5	F	6	7	14
4-6	G	3	5	7
4-7	H	4	11	12
5-7	I	2	4	6
6-7	J	2	9	10

1. Draw the project network.
2. Find the critical path.
3. Find the probability that the project is completed in 19 days. If the probability is lessthan 20%, find the probability of completing it in 24 days.