Groundwater at a flow rate of $5000\frac{L}{m}in,$ containing three volatile organic chemicals $($VOCs$),$ is to be stripped in a tray tower with pure air to produce drinking water that will meet drinking water standards. Relevant data are given below. Determine the air flowrate and the number of equilibrium

stages required if an air flowrate of twice the minimum is used and the tower operates at $25C$ and $1$ atm. Also, determine the composition in parts per million for each VOC in the resulting drinking water.

$*$ppm by mole