A three-component mixture at 600 lb /in. 2 abs is fed to a membrane separator with

A three-component mixture at 600 lb_ƒ/in.² abs is fed to a membrane separator with a permeate pressure of 120 lb_ƒ/in.² abs. The mixture has 50 percent A, 30 percent B, and 20 percent C. and the permeabilities are Q_A = 0.4. Q_B = 0.1, and Q_c = 0.15, all in ft³ (std)/ft²·h·atm. Estimate the local composition of the permeate at the inlet end of the separator.