urgent!!

Exercise 7.13 Bubble and dew point calculations. (a) A gas mirture of 15 mol-\% bentene, 5 mol-\% toluene and the rest nitrogen is comprrssed isothermally ot 100 C C until condensation occurs. What will be the composition of the initial condensate? (b) Calculate the temperature and composition of a vapor in equilibrium with a liquid that is 25mol%F bensene and 75mol% toluene at Iatm. Is thix a bubble point or a dew point? (c) Calculate the temperature and composition of a liquid in equilibrium with a gas mixture containing 15 mol-\% benzene, 25 mol-\% toluene and the rest nitrogen (which may be considered non-condensable) at Iatm. Is this a bubble point or a dew point