If the risk-free rate is 2% and the market risk premium is 7%, what is the required return for a stock with a beta of 0.7? O 5.50% O 5.10% O 6.90% O 2.49% Stock A has an expected return of 28% and Stock B has an expected return of 4%. If you have $20,000 to invest in the two stocks, how much would you have to invest in Stock A to have a portfolio expected return of 15%