a. 300mol/h of a solution containing 49mol% isobutyl alcohol (IBA), 33mol% diisopropyl ether (DI E), and 18mol% water (W) is to be purified. The diisopropyl ether is desired to be recovered by liquid-liquid extraction at 25C and 1atm with 789mol/h of mostly water as the solvent. It is desired to produce an ether stream containing no more than 10mol% isobutyl alcohol and an isobutyl alcohol stream containing at least 54mol% isobutyl alcohol. 1) What is the mol\% of DI E in the solvent stream if the solvent contains no IBA