The returns on the common stock of New Image Products are quite cyclical. In a boom economy, the stock is expected to return 32 percent in comparison to 14 percent in a normal economy and a negative 28 percent in a recessionary period. The probability of a recession is 25 percent while the probability of a boom is 10 percent. What is the standard deviation of the returns on this stock?

19.94 percent

21.56 percent

25.83 percent

32.08 percent

39.77 percent