stock of Firm A and Firm B: a. If Mary invests half her money in each of the two common stocks, what is the portfolio's expected rate of return and standard deviation in portfolio return? b. Answer part a where the correlation between the two common stock investments is equal to zero c. Answer part a where the correlation between the two common stock investments is equal to +1. d. Answer part a where the correlation between the two common stock investments is equal to 1 . e. Using your responses to questions a-d, describe the relationship between the correlation and the risk and return of the portfolio. Data table (Click on the icon in order to copy its contents into a spreadsheet.)