A stock is expected to earn 15 percent in a boom economy and 7 percent in a normal economy. There is a 35 percent chance the economy will boom and a 65.0 percent chance the economy will be normal. What is the standard deviation of these returns?
A. 3.82 PercentB. 4.85 PercentC. 4.97 PercentD. 5.63 Percent.