Consider a three-factor APT model. The factors and associated risk premiums are: Factor Change in pross national product (GNP) Change in energy prices Change in long-term interest rates Risk Premium (S) -6.6 0.4 Calculate expected rates of return on the following stocks. The risk-free interest rate is 6.9% O. A stock whose return is uncorrelated with all three factors (Enter your answer as a percent rounded to 1 decimal place.) b. A stock with average exposure to each factor (le, with D=1 for each). (Enter your answer as a percent rounded to 1 decimal place.) c. A pure-play energy stock with high exposure to the energy factor (b=2.3) but zero exposure to the other two factors. (Enter your answer as a percent rounded to 2 decimal places.) d. An aluminum company stock with average sensitivity to changes in interest rates and GNP, but negative exposure of b= -1.4 to the energy factor (The aluminum company is energy-intensive and suffers when energy prices rise) (Enter your answer as a percent rounded to 2 decimal places.) 3 % b Expected rate of return Expected rate of return Expected rate of return Expected rate of return 96 C % d %