$7-19.$ If the wide$-$flange beam is subjected to a shear of $V=30kN,$ determine the shear force resisted by the web of the beam. Set $w=200mm.$ The neutral axis is located at $\frac{?}{\text{b}\text{a}\text{r}}(y)=0\mathrm{.}1747m$ from the bottom and $I_{NA}=0\mathrm{.}2182({10}^{-3})m^4.$