7. There are few, if any real companies with negative betas. But suppose you found one with beta = -25. a) How would you expect this stock's rate of return to change if the overall market rose extra 5%? What if the market fell extra 5%? b) You have 1 million invested in well-diversified portfolio of stocks. Now you receive an additional $20,000 bequest. Which of the following will yield the safest overall portfolio return? i. Invest $20,000 in Treasury bills (with beta-0) ii. Invest $20,000 in stocks with beta=1 Invest $20,000 in stocks with beta=-0.25 Explain your