solve part b only

13.9. A mixture containing equimolar amounts of benzene(1), toluene(2), and ethylbenzene(3) is flashed to conditions T and P. For one of the following conditions, determine the equilibrium mole fractions {xi} and {yi} of the liquid and vapor phases formed and the molar fraction V of the vapor formed. Assume that Raoult's law applies. (a) T=110C,P=90kPa. (b) T=110C,P=100kPa. (c) T=110C,P=110kPa. (d) T=110C,P=120kPa