It is desired to extract the acetic acid from a 50% aqueous solution with isopropyl ether. The equilibrium data are: a) the maximum amount of solvent that can be used if the process is carried out in a single-stage operation. b) For a feed of 100kg/h, calculate flow rates and compositions of extract and raffinate if the amount of solvent is 1.4 times the minimum. c) If it is subjected to a second stage in cross current using the same amount of solvent, determine the compositions and flow rates of exit. Would it improve the operation? Why