A feed of acetic acid in water (40 wt% acetic acid and 1000 kg/h) flows into a single stage mixer-settler system, where 3200 kg/h of pure isopropyl ether is fed as a solvent.

(a) Determine the outlet compositions and flow rates of the extract and raffinate from the system.

(b) If the same feed is instead sent to a multistage extraction tower, what is the minimum required solvent flow rate if the desired raffinate composition is 2 wt% acetic acid?