For the upcoming year, the risk$-$free rate is $2$ percent, and the expected return to the market is $7$ percent. You are also given the following covariance matrix for Securities J$,$ K$,$ and $L.$

$\backslash$table$[[$Covariance$,$Security J$,$Security K$,$Security L$],[$Security J$,0\mathrm{.}0012532,0\mathrm{.}0010344,0\mathrm{.}0019711],[$Security K$,0\mathrm{.}0010344,0\mathrm{.}0023717,0\mathrm{.}0013558],[$Security L$,0\mathrm{.}0019711,0\mathrm{.}0013558,0\mathrm{.}0048442]]$

Also assume that you form a portfolio by putting $60$ percent of your funds in Security J$,40$ percent of your funds in Security K$,$ and $0$ percent of your funds in Security L$.$ Based on this information, determine the standard deviation of the resulting portfolio.

$4\mathrm{.}24\%$

$4\mathrm{.}60\%$

$3\mathrm{.}50\%$

$3\mathrm{.}64\%$

$3\mathrm{.}94\%$