The rate of return on the common stock of Flowers by Flo is expected to be 14 percent in a boom economy, 8 percent in a normal economy, and only 2 percent in a recessionary economy. The probabllities of these economic states are 10 percent for a boom, 50 percent for a normal econorny, and 40 percent for a recession. What is the standard deviation of returns for this investment? Round to the nearset hundredth percent. Answer in the percent format. Do not include \% sign in your answer (i.e. If your answer is 4.33%, type 4.33 without a $ sign at the end.)