Edison holds a $5,000 portfolio that consists of four stocks. His investment in each stock, as well as each stock's beta, is listed in Stock Investment Beta Standard Deviation Andalusian Limited (AL) $1,750 1.00 18.00% Zaxatti Enterprises (ZE) $1,000 1.90 12.00% Water and Power Co. (WPC) $750 1.20 20.00% Makissi Corp. (MC) $1,500 0.60 28.50% Suppose all stocks in Edison's portfolio were equally weighted. The stock that would contribute the least systematic risk to the port Makissi Corp. Further, if all of the stocks in the portfolio were equally weighted, the stock that would have the leas unsystematic risk is If the risk-free rate is 5.00% and the market risk premium is 7.50%, then Edison's portfolio will exhibit a beta of 1.090 and a 13.18%