The following table shows the nominal returns on U.S. stocks and the rate of inflation Year Nominal Rotum (96) Intation 2010 14.4 3.9 2011 70 26 2012 140 28 2013 5.6 4.7 2014 -32.8 1 a. What was the standard deviation of the nominal market returns? (Do not make the adjustment for degrees of freedom described in footnote 18.) (Use decimals, not percents, in your calculations. Do not round Intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Standard deviation b. Calculate the arithmetic average real robin (A negative answer should be indicated by a minus sign. Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.) Average real return