A stock will have a loss of 13.3 percent in a recession, a return of 12 percent in a normal economy, and a return of 26.7 percent in a boom. There is 30 percent probability of a recession, 39 percent probability of normal economy, and 31 percent probability of boom. What is the standard deviation of the stock's returns? Multiple Choice O 11.85% O 14.49% O O 15.81% O 13.55% 24.98% O