Exam Four 1 Seve Use the following information on states of the economy and stock returns to calculate the standard deviation of retums. Assume that all three states are equally likely. (Do not round Intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) 005742 State of Roonomy Recession Normal Boom Security Return Lf State Occurs -5.50% 12.00 19.00 Expected retum Standard deviation Help Seve & Exit Submit