powe Stuart Company's manager believes that economic conditions during the next year will be strong, normal, or weak, and she thinks that the firm's returns will have the probability distribution shown below. What's the standard deviation of the estimated returns? Prob. 30% 4096 30% Return 32.0% 10.0% 16.0% Economic Conditions Strong Normal Weak 7.69% 8.62% 9.24% 10.5296 11.55%