It is desired to remove the NH$3$ contained in a NH$3-$air gas stream by absorption in water. The absorption tower operates at $60\backslash$deg C and $3$ atm. The individual mass transfer coefficients were determined for the liquid $($kL $=1\mathrm{.}10$ lb mol NH$3/$ft$2$h $($mol NH$3/$ft$3))$ and gaseous $($kG $=0\mathrm{.}25$ lb mol NH$3/$ft$2$ h$$ atm$)$ films.$).$ The partial pressure of ammonia in equilibrium on dilute solutions of ammonia in water is given by the relation: pA$,$ i $=0\mathrm{.}25$CA$,$ i$,$ where pA$,$ i is in atm and CA$,$ i$,$ in moles of NH$3/$ft$3$ of solution. Determine the following mass transfer coefficients:

a$)$ ky

b$)$ kc $($corresponding to the gaseous film$)$

c$)$ KG

d$)$ KL