A chimney with a design stack height of $300m$ is emitting sulfur dioxide at a rate of $600\frac{g}{s}$ with moderate wind speed of $7\frac{m}{s}$ at a stack altitude. Estimate the concentration of sulfur dioxide downwind for the following situation: $,$

H$).$ Given that ${}_y=0\mathrm{.}295x^{0\mathrm{.}903}$ and ${}_z=0\mathrm{.}119x^{0\mathrm{.}986}$

$[4$ Marks$]$