Cheyenne 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: Stock Perpetualcold Refrigeration Co. (PRC) Zaxatti Enterprises (ZE) Western Gas & Electric Co. (WGC) Mainway Toys Co. (MTC) Investment $2,625 $1,500 $1,125 $2,250 Beta 0.90 1.30 1.10 0.60 Standard Deviation 18.00% 11.00% 18.00% 19.50% Suppose all stocks in Cheyenne's portfolio were equally weighted. Which of these stocks would contribute the least market risk to the portfolio? O Perpetualcold Refrigeration Co. Mainway Toys Co. Zaxatti Enterprises Western Gas & Electric Co. Suppose all stocks in the portfolio were equally weighted. Which of these stocks would have the least amount of stand-alone risk? Zaxatti Enterprises Mainway Toys Co. Western Gas & Electric Co. Perpetualcold Refrigeration Co. If the risk-free rate is 7% and the market risk premium is 8.5%, what is Cheyenne's portfolio's beta and required return? Fill in the following table: Beta Required Return Cheyenne's portfolio