The following table shows the nominal returns on Brazilian stocks and the rate of inflation. Year Nominal Return (%) Inflation (%) 2015 2016 0.1 -14.0 2017 -12.0 2018 -41.8 2019 2020 66.6 27.3 6.2 6.3 6.8 11.1 6.7 3.3 a. What was the standard deviation of the market returns? Note: Use decimals, not percents, in your calculations. Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places. b. Calculate the average real return. Note: 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.