Eileen 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 Eileen'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 Eileen's portfolio will exhibit a beta of and a required return of