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 23.0% in comparison to 13.0% in a normal economy and negative 14.0% in a recessionary period. The probability of a recession is 12%. There is a 28% chance of a bom 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 10.74% Sh 19.33% 10.52% 13.42%