For 15 minimum equilibrium stages at 250 psia, calculate and plot the percent recovery of C3 in the distillate as a function of distillate flow rate for the distillation of 1,000 lbmol/h of a feed containing 3% C₂, 20% C₃, 37% nC₄, 35% nC₅, and 5% nC₆ by moles. Obtain K-values from figure.