Q9) There is a 17.35% probability of a below-average economy and a 82.65% probability of an average economy. If there is a below-average economy, Stocks A and B will have returns of 4.72% and -0.32% , respectively. If there is an average economy, Stocks A and B will have returns of 19.50% and 4.46%, respectively. Compute the Standard deviation for stocks a and b.