Ninety-five percent of ethylene glycol in a 20 mole percent ethylene glycol 80 mole percent water mixture must be recovered in the residue from a batch distillation tower equivalent to three equilibrium stages(including the still pot) operating at 228 mm Hg. An overall distillate composition of 5 mole percent of 5 mole percent ethylene glycol is desired.(a) If the distillate composition is held constant, what must be the initial and final reflux ratios?(b) If the reflux ratio is held constant, what must be its value?

Given: