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2. Consider the flow diagram below, which shows the steady state operation of two columns in a distillation train. All compositions provided are given as mass fractions. The total mass flow rate of Stream 8 is 6 times larger the the flow rate of Stream 5. (50 points) For full credit, include a DOF analysis that guides your problem solving, and the related process flow diagram, with labeled knowns and unknowns. You will full credit if you properly set up the DOF analysis, the diagram and the equations. Correct answers to parts b and c will get you 5 points extra credit for each part. Based on this flow diagram, answer the following questions. a. What are the compositions of stream 7 and stream 8 ? (20 points) b. What are the mass flow rates of streams 5 and 6 ? ( 20 points) c. What is the composition and total mass flow rate of stream 3 ? (10 points)