To understand how two-pressure distillation works, in Lab 7 plot \(\mathrm{y}-\mathrm{x}\) diagrams (from Aspen Plus Analysis) for MEK versus water (plot MEK mole fractions) at \(1.0 \mathrm{~atm}\) and for water versus MEK (plot water mole fractions) at 100.0 psia. For each diagram, mark the values for distillate and bottoms (MEK numbers for liquids on the \(1.0-\mathrm{atm}\) plot, and water numbers for liquids on the \(100-\) psia plot). Then plot operating lines using the liquid and vapor flow rates found from the profiles (TPFQ tab). Note that the water concentration of D1 is the feed to the \(100-\mathrm{psia}\) column. The net feed to the \(1.0-\mathrm{atm}\) column is the average MEK concentration of the fresh feed plus stream D2. The distillation columns are forced to produce products very close to the azeotropic concentrations at both pressures.