$9\mathrm{.}6$ A liquid mixture containing $40\%$ mole percent methanol and $60\%$ mole pe water is to be separated in a continuous fractionating column at a pressure of $1$atm. Calc the value of $q$ for the various conditions of feed: $(a)$ the feeding is at $40C$;$(b)$ the satu liquid; $(c)$ the saturated vapor.