A stock will have a loss of 14.2 percent in a recession, a return of 12.9 percent in a normal economy, and a return of 27.6 percent in a boom. There is 27 percent probability of a recession, 30 percent probability of normal economy, and 43 percent probability of boom. What is the standard deviation of the stock's returns? Multiple Choice O 17.04% 12.78% 15.62% 14.60% 29.02%