Kindly use a detailed material balance. Pls, give an effort Thank you!

Acetic acid is to be extracted from an aqueous solution by counter-current extraction with isopropyl ether. The feed is 10,000 kg/hr of 28% acetic acid. The number of equilibrium stages required for a solvent feed rate of 30,000 kg/hr and an extract composition of 8% acetic acid is a. 4 b. 5 c. 8 d. 10 The minimum solvent to feed ratio which will give the same raffinate composition is a. 3.14 b. 4.3 c. 2.4 d. 1.75