9 of 13 17 Given the following information, what is the standard deviation of the return of this stock? State of Economy Rate of Probability of State of Return Economy (%) 0.12 15.0% 0.06 11.0% 0.82 -12.0% Boom Normal Recession ) ab can 9.89% 14.15% 10.29% 4.35% 9.79% 4.16% f)