Mutual solubility data for the isooctane $(1)/$furfural $(2)$ system at $25C$ are

Compute:

a$)$ The distribution coefficients for isooctane and furfural

b$)$ The relative selectivity for isooctane relative to furfural

c$)$ The activity coefficient of isooctane in liquid phase $1$ and the activity coefficient of

furfural in liquid phase II assuming

$\{$:${}_2^{(1)})=1\mathrm{.}0$ and ${}^{(2)}$