A stock had the following annual returns: $09\mathrm{.}81\%,27\mathrm{.}79\%,-13\mathrm{.}59\%,$ and $-14\mathrm{.}07\%.$ What is the stock's:

A$.$ expected return? $0\mathrm{.}02485$

B$.$ variance? $0\mathrm{.}02229799$

C$.$ standard deviation?