6. Conceptualquestions on portfolio and stand-alone risk Caroline holds a $7,500 portfolio that consists of four stocks. Her investment in each stock, as well as each stock's beta, is listed in the following table Suppose all stocks in Caroline's portfolio were equally weighted. The stock that would contribute the least systematic risk to the portfolio is . Further, if all of the stocks in the portfolio were equally weighted, the stock that would have the least amount of unsystematic risk is If the risk-free rate is 5.00% and the market risk premium is 7.50%, then Caroline's portfolio will exhibit a beta of and a required return of