Please assist with a-e. Thank you

Computing the standard deviation for a portfolio of two risky investments) Mary Guilott recently graduated from Nichols State University and is anxious to begin investing her meager savings as a way of applying what she has learned in business school. Specifically, sheis evaluating an investment in a portfolio comprised of two fims' common stock. She has collected the following information about the common stock of Firm A and Firm B: EEB 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 o invest 50% o her money n Firm As common stock and 50% n Firm B's common stock and the correla between the two sto Round Owo a Mary decides decimal places.) ss then the expected rate o return in he portfolios