Based on the following information, calculate the expected return. State of EconomyProbability of StateRate of Return If State occurs Recession Normal Boom of Economy 15 60 25 19 18 32 14.3% 10% 14.7% 15.59% You've observed the following returns on Barnett Corporation's stock over the past five years: 15 percent, 13 percent, 18 percent, 7 percent, and 10 percent. What was the standard deviation? 8.15% 20.5% 5.5% 11.8%