please answer b

The following table shows the nominal returns on Brazilian stocks and the rate of inflation. 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