can someone help please

hits in two stocks. The expected onstruct four portfolios by investing different weights in return and STD of these portfolios are given below. Portfolio Expectation Return Standard Deviation 8.25% 1.06% 8.8% 1.05% 8.53% 1.06% 9.13% 1.05% w Which of the following portfolios is on the efficient frontier? A) Only portfolio W is on the efficient frontier. B) Only portfolio X is on the efficient frontier. C) Only portfolio Y is on the efficient frontier. D) Only portfolio Z is on the efficient frontier. --rent market price -40 cash