I am not able to determine the Optimal Complete Portfolio from the given information ibellow. So could anyone help me to solve this problem?

Thank you in advance.

Efficient Frontier Portfolio P-mean P-std Sharpe AT&T COKE DUPONT EXXON 22.8 42.85 0.4387 -2.0473 1.5544 0.5379 0.9551 21.8 39.43 0.4513 -1.804 1.4358 0.4823 0.8859 20.8 36.06 0.4657 -1.5608 1.3173 0.4268 0.8167 19.8 32.76 0.4822 -1.3175 1.1988 0.3712 0.7475 18.8 29.54 0.5009 -1.0742 1.0802 0.3157 0.6783 17.8 26.43 0.522 -0.8309 0.9617 0.2601 0.6091 16.8 23.48 0.545 -0.5876 0.8431 0.2046 0.5399 15.8 20.76 0.5683 -0.3443 0.7246 0.149 0.4704 14.8 18.36 0.5879 -0.1011 0.6061 0.0935 0.4015 13.8 16.44 0.5959 0.1422 0.4875 0.0379 0.3323 12.8 15.17 0.5798 0.3855 0.369 -0.0176 0.2632 11.8 14.72 0.5296 0.6288 0.2504 -0.0732 0.194 13.87 16.57 0.5959 0.1234 0.4967 0.0422 0.3377 \f