what the answer

A mixture of 6.00gram moles of benzene and 4.00gram-moles of toluene are placed in a closed cylinder equipped with a piston. The cylinder is immersed in a bath of boiling water that maintains the temperature at 100.0C. The force exerted on the piston can be varied to adjust the cylinder pressure to any desired values. The pressure is initially 1300mmHg and is gradually lowered to 600mmHg. Ase benzene and toluene and to answer the following questions. T=100C (b) Pxy diagram