Elaine is considering investing in a stock portfolio and is aware that the return on that portfolio is particularly sensitive to how the economy is performing. Her analysis suggests that two states of the economy can affect the return on the portfolio. Using the table of returns and probabilities below, calculate standard deviation of the portfolio return (portfolio risk)? Round your answer to 4 decimal places. E.g. if the answer is 0.058312, please type 0.0583 in the answer box