1. A stock will have a loss of 10.2 percent in a bad economy, a return of 10 percent in a normal economy, and a return of 23.9 percent in a hot economy. There is 24 percent probability of a bad economy, 45 percent probability of a normal economy, and 31 percent probability of a hot economy. What is the variance of the stock's returns?

2. A stock will have a loss of 13.2 percent in a recession, a return of 11.9 percent in a normal economy, and a return of 26.6 percent in a boom. There is 29 percent probability of a recession, 40 percent probability of normal economy, and 31 percent probability of boom. What is the standard deviation of the stock's returns?