Question $9(1$ point$)$

When a sample of the $C{H}_{2}C{l}_2$ layer with a volume of $5\mathrm{.}49mL$ is collected, it requires $17\mathrm{.}79mL$ of a titrant solution of $S_2{O}_3^{2-}$ with a concentration of $0\mathrm{.}01321M$ to reach the endpoint. The reaction has a $2$:$1$ mole ratio of thiosulfate to iodine. Determine the concentration $($in $mo\frac{l}{L})$ of iodine in the dichloromethane layer. Include only the numerical answer $($no units$).$