Q7. You have been provided the following data about the securities of three firms, the market portfolio (Market), and the risk-free asset. What is the missing value for Q7 in the table? Security E(R) stdev correl Beta Firm A 9% 0.20 Q7 0.80 Firm B 12% 08 0.40 1.50 Firm C 11% 0.80 0.35 09 Market 10% 0.20 Rf asset 4% O a. 0.85 O b. 0.90 . 0.80 O d. 0.75 Oe. none of the above