RETURNS
Month	Stock1	Stock2	Stock3
1	0.0616	0.0649	0.12745
2	-0.003	0.098	0.08696
3	0.2208	-0.124	0.0976
4	0.0186	0.001	0.18978
5	-0.107	0.0866	-0.01841
6	-0.038	-0.046	-0.14875
7	-0.061	0.001	0.01471
8	0.1173	-0.033	0.2971
9	-0.117	-0.061	0.0905
10	-0.026	0.0824	-0.09744
11	-0.081	-0.141	-0.0625
12	0.163	0.0636	0.12242
13	0.0191	0.0689	0.2
14	0.0785	0.0455	0.12613
15	0.0116	0.023	0.0528
16	-0.046	0.1255	0.04943
17	-0.053	0.0757	0.00725
18	0.0671	-0.11	-0.11065
19	0.0299	0.0307	0.05668
20	0.0095	-0.127	-0.06897
21	0.0231	0.0803	0.1121

5) Create potfolio weight table
Portfolio No.	Weight 1	Weight 2	Weight3
1	0.00%	0%	100%
2	0.00%	20%	80%
3	0.00%	40%	60%
4	0.00%	60%	40%
5	0.00%	80%	20%
6	0.00%	100%	0%
7	20.00%	0%	80%
8	20.00%	20%	60%
9	20.00%	40%	40%
10	20.00%	60%	20%
11	20.00%	80%	0%
12	40.00%	0%	60%
13	40.00%	20%	40%
14	40.00%	40%	20%
15	40.00%	60%	0%
16	60.00%	0%	40%
17	60.00%	20%	20%
18	60.00%	40%	0%
19	80.00%	0%	20%
20	80.00%	20%	0%
21	100.00%	0%	0%

Standard deviation of each stock

Stock1	Stock2	Stock3
7.21%	7.61%	11.01%

now create columns for

1. Portfolio return
2. Portfolio risk
3. Find the feasible set.
4. Find the efficient set