usan hoids a $5,000 portfolio that consists of four stocks. Her investment in each stock, as weil as each stock's beta, is listed in the following table: Suppose all stocks in Susan's portfolio were equally weighted. The stock that would contribute the least systematic rikk to the portfollo is least amount of unsystematic risk is . Futher, it all of the stocks in the nortfollo were equaliy weighted, the stock that would have the