Emma holds a $5,000 portfolio that consists of four stocks. Her investment in each stock, as well as each stock's beta, is listed in the following t Stock Investment Beta Standard Deviation Perpetualcold Refrigeration Co. (PRC) $1,750 0.90 9.00% Tobotics Inc. (TI) $1,000 1.50 11.50% Three Waters Co. (TWC) $750 1.15 18.00% Mainway Toys Co. (MTC) $1,500 0.30 22.50% Suppose all stocks in Emma's portfolio were equally weighted. Which of these stocks would contribute the least market risk to the portfolio? Mainway Toys Co. Perpetualcold Refrigeration Co. Three Waters Co. Tobotics Inc. Suppose all stocks in the portfolio were equally weighted. Which of these stocks would have the least amount of stand-alone risk? Perpetualcold Refrigeration Co. Tobotics Inc. Mainway Toys Co. Three Waters Co. If the risk-free rate is 7% and the market risk premium is 8.5%, what is Emma's portfolio's beta and required return? Fill in the following table: Beta Required Return Emma's portfolio