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

Year	Nominal Return (%)	Inflation (%)
2012	0.1	7.8
2013	-15.0	7.9
2014	-13.0	8.4
2015	-43.4	12.7
2016	68.2	8.3
2017	28.9	4.9

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.)

b. Calculate the average real return.