Please review all three parts, struggling a bit with these ones! Thank you in advance.

The following table gives the returns for Exxon and Apple for the previous four years. You have invested 40% of your wealth in Exxon and 60% in Apple over that period. Given the information below, what is the standard deviation of your portfolio's returns? Select the range that includes the correct solution. Year Exxon Apple 2019 2% 86% 2018 - 18% -7% 2017 -7% 46% 2016 12% 10% Less than 25% Greater than or equal to 25%, but less than 26% Greater than or equal to 26%, but less than 27% Greater than or equal to 27%, but less than 28% O Greater than or equal to 28% You have two stocks, A and B, that you are going to combine in a portfolio. Stock A has an expected return of 15% and a standard deviation of 38%. For Stock B, the expected return is 9% and the standard deviation is 25%. Assume that the correlation coefficient, PAB, is +0.55. What is the standard deviation of a portfolio that has equal dollar weights in Stocks A and B? Select the range that includes the correct solution. Less than 25% Greater than or equal to 25%, but less than 26% Greater than or equal to 26%, but less than 27% O Greater than or equal to 27%, but less than 28% Greater than or equal to 28% You own positive amounts of the stock of two companies in your portfolio (i.e., you have weights greater than 0%, but less than 100% for each of the two securities). Stock X has an expected return of 10% with a standard deviation of 40%. Stock Y has an expected return of 20% with a standard deviation of 50%. Without knowing the correlation between the two stocks, which of the following statements could be true? 1. The standard deviation of your portfolio can be less than 40%. II. The standard deviation of your portfolio can be greater than 50%. III. The expected return of your portfolio can be less than 10%. IV. The expected return of your portfolio can be greater than 20%. I only Il only Ill only OIV only More than one of the above statements (1, II, III, IV) could be true