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? $($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 average real return. $($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