6. (a) Calculate the ratio of the mass of the water-rich layer (L₁) to that of the aniline-rich layer (L₂), for a 20-wt% water-aniline mixture at 363K. The compositions along the tie line be are maintained at 363K. The composition at c is 20%; for L₁ at b, it is 8%; and for L₂ at e, it is 90%. (5%)