The performance of the common stock of Apple Stores is highly dependent upon the state of the economy. In a boom economy, the stock is expected to return 25.0% in comparison to 14.0% in a normal economy and negative 11.0% in a recessionary period. The probability of a recession is 11%. There is a 28% chance of a boom economy. The remainder of the time the economy will be at normal levels. What is the standard deviation of the returns on Apple stock? Multiple Choice 8.91% 5.27% 9.72%