The past five monthly returns for Kohls are $3\mathrm{.}70$ percent, $4\mathrm{.}02$ percent, $1\mathrm{.}84$ percent, $9\mathrm{.}33$ percent, and $2\mathrm{.}72$ percent. Compute the standard deviation of Kohls$$ monthly returns.

Note: Do not round intermediate calculations and round your final answer to $2$ decimal places.