You recently purchased a stock that is expected to earn 25 percent in a booming economy, 10 percent in a normal economy, and lose 38 percent in a recessionary economy. There is a 10 percent...

You recently purchased a stock that is expected to earn 25 percent in a booming economy, 10 percent in a normal economy, and lose 38 percent in a recessionary economy. There is a 10 percent probability of a boom and a 75 percent chance of a normal economy. What is standard deviation on this stock?