e$.$ For superheated vapor feed, FL $=0.$ Show LS $$ LR $=$F$\_$VC$\_$P $($TF $$ Tsat$)/\backslash$Delta Hvap.

f$.$ For a feed mixture of saturated liquid and saturated vapor.

Show VR $=$ VS $+$ FV$,$ LS $=$ LR $+$ FL$.$

h$.$ Use the mass and energy balances around the reboiler to

relate the reboiler duty to the enthalpy of vaporization.