Suppose that we have the following sample of historical data on nominal security returns and inflation:

Year Jose Crab Susan Berger T-Bill Inflation

2016 4% -2% 2% 0.5%

2017 -2% 1% 1% 1%

2018 5% 8% 0.5% 1%

What is the standard deviation of annual returns on Good Burger stock? answer me as a decimal, tofour decimal places. For example, write 12.34% as 0.1234.