Question #2: It is required to distill 2000 kmols/hr of a saturated liquid feed of composition 45.6 mole% propane, 22.1 mole% n-butane, 18.2 mole% n-pentane, and 14.1 mole% n- hexane at a total pressure of 101.3 kPa. A fractional recovery of 99.4% of propane is desired in the distillate and 99.7% of the n-butane in the bottoms. Estimate the fractional recovery of n-pentane and n-hexane in the bottom. Given that the top and bottom temperatures are 390 K and 450 K, respectively.