URGENT PLEASE ANSWER NOW

A lab operation results in the release of air containing chloroform into the environment. To remedy this, an absorber is being proposed to scrub the gas using pure water to decrease the chloroform concentration to $0\mathrm{.}0025$mol. If the air stream enters the column at $9,800mo\frac{l}{h}$ with $0\mathrm{.}025$mol of chloroform, and the pure water enters the column at $63,000mo\frac{l}{h},$ calculate the number of theoretical stages that should be designed into the absorption column using the answers from Question $2$ for the phase equilibrium line. The air is at $30C$ and $101\mathrm{.}3$kPa. Assume that the flow rates $($L and V$)$ are constant.

a$.$ Using the graphical method $(20$ marks$)$

b$.$ Using the Kremser's Equation $(15$ marks$)$