What is the coefficient of I₂ (s) when the reaction below is balanced with smallest whole number coefficients?

$\begin{array}{r}-{\mathrm{Cr}}_2{\mathrm{O}}_7^{2-}\left(aq\right)+{\mathrm{I}}^{-}\left(aq\right)+\_{\mathrm{H}}^{+}\left(aq\right)\\ ⟶-{\mathrm{I}}_2\left(s\right)+\_{\mathrm{Cr}}^{3+}\left(aq\right)+\_{\mathrm{H}}_2\mathrm{O}\left(l\right)\end{array}$