You work for the stunningly effective WQ Endurance Fund, and are putting together a 2-stock portfolio. You choose to invest 20% of your money in Verizon Communications Inc. (ticker: VZ) stock and 80% of your money in AT&T Co.'s (ticker: T) stock. Both companies compete in the telecom and media industries. VZ has a beta of 0.7 and standard deviation of 0.40. AT&T has a beta of 0.6 and a standard deviation of 0.30. The two stocks have a correlation coefficient of 0.9. Assume that the expected return on the market portfolio is 9% and the risk-free rate is 4%. What would be the standard deviation of this portfolio? Input your answer as a percentage with two decimal places. For example, if your result is 14.567%. input 14.57