For the period of 2017 to 2022, the returns to the S&P 500 index were 19.4% 4.2%, 24.99 16.3%, 26.9%, -19.4%. Compute the standard deviation of annual returns for this period for the S&P 500 Index. 16.5% 10.3% 12.2% 19.5% None of these are correct.

ske soo index. 16.5% 10.3% 12.2% 19.5% None of these are correct