The stock of Business Adventures sells for $50 a share right now. Its likely dividend payout and end-of-year price depend on the state of the economy by the end of the year as follows: Dividend Stock Price in One Year Boom $ 3.00 $ 58 Normal economy 1.40 52 Recession 0.70 43 Calculate the standard deviation of the holding-period returns. All three scenarios are equally likely. (Do not round intermediate calculations. Round your answer to XX.XX% format.)