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

Year Nominal Return $(\%)$ Inflation $(\%)$

$20150\mathrm{.}26\mathrm{.}5$

$2016-13\mathrm{.}06\mathrm{.}6$

$2017-11\mathrm{.}07\mathrm{.}1$

$2018-42\mathrm{.}111\mathrm{.}4$

$201966\mathrm{.}97\mathrm{.}0$

$202027\mathrm{.}63\mathrm{.}6$

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.

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