A steam stripper is operating isothermally at \(100.0^{\circ} \mathrm{C}\). Entering liquid stream contains \(0.02 \mathrm{~mol} \%\) nitrobenzene in water at \(100.0^{\circ} \mathrm{C}\). Flow rate of entering liquid is \(1.0 \mathrm{kmol} / \mathrm{min}\). Entering steam is pure water at \(100.0^{\circ} \mathrm{C}\). Outlet liquid mole fraction is 0.00001 nitrobenzene. \(\mathrm{L} / \mathrm{V}=12.0\). Total liquid and gas flow rates are constant. At \(100.0^{\circ} \mathrm{C}\) equilibrium in terms of nitrobenzene mole fraction is \(y=28.0 x\). Find the outlet mole fraction of nitrobenzene in the vapor stream and the number of stages.