A stock will have a loss of 14.4 percent in a recession, a return of 13.1 percent in a normal economy, and a return of 27.8 percent in a boom. There is 25 percent probability of a recession, 28 percent probability of normal economy, and 47 percent probability of boom. What is the standard deviation of the stock's returns? Multiple Choice O 14.61% 12.79% O 15.63% d 17.05%