HOW DO YOU DO THE STANDARD DEVATION OF STOCKS??????

Consider the following information: Rate of Return if State Occurs State of Economy Recession Normal Boom Probability of State of Economy .15 .55 .30 Stock A .04 .09 .17 Stock B -.17 .12 .27 a. Calculate the expected return for Stocks A and B. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) b.Calculate the standard deviation for Stocks A and B. (Do not round intermediate calculations and enter your answers as a percent rounded to 2 decimal places, e.g., 32.16.) a. Stock A expected return a. Stock B expected return b. Stock A standard deviation 10.65 % 12.15% 3.60 % % b. Stock B standard deviation