Q3: A quaternary mixture with 4 mole% component A, 40 mole% component B, 50 mole% component C and component D is to be distillate it at 1 atm with 98% component B and 1% of component C recovered in the distillate and 99% of component C in the bottom streams. Given dac=6.46, Abc=2.48 and arc=0.41. Calculate: (i) The composition of top and bottom products. [3.0 marks] (ii) What is the minimum reflux ratio for a liquid feed at the boiling point (T=80 C)? [3.0 marks]