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 rele of retuen and standard deviaton in porticilo retian? b. Anvwer part a where the correlabon between the two common stock investrisents is oqual to zoro. c. Antwor part a where the correlation between the two common stock investments is equal to +1 . d. Answer palt a where the correlation between the two common stock investments is equal to =1. e. Using your responses to questions an- d. describe the relationship between the correlasion and ene risk and rotum of the portfolio. 17. (Round is two decimal places.) Data table