1 points Save AS North Around, Inc stock is expected to return 22 percent in a boom, 13 percent in a normal economy and -15 percent in a recession. The probabilities of a boom, normal economy, and a recession are 6 percent, 92 percent, and 2 percent, respectively What is the standard deviation of the retums on this stock? O a 20.54 percent O b. 1879 percent OC 46 percent od 2.15 percent O 453 porcent Activate Window Soch Tu Wind