$(3$ points$)$ A reverse osmosis membrane has a $k_w$ value of $)$ and a $k_s$ value of

$5*{10}^{-4}\frac{L}{m^2*s}.$ Find the permeate salt concentration if the feed concentration is $2,000m\frac{g}{L},$

the system operates at a gauge pressure of $\frac{30}{b}ar$ on the feed side of the membrane, and

$98\%$ of salt is rejected. You may assume the permeate has a negligible osmotic pressure.