Problem \#2: In an extraction unit, a 60kg /hour feed stream containing methyl ethyl ketone (MEK) and water is contacted with a stream of pure n-octane. The composition of the feed stream is 55wt%MEK and 45wt% water. In the unit, MEK transfers from the water phase to the octane phase, thereby purifying the water. You may assume that water and n-octane are completely insoluble, and therefore no stream entering or exiting the process will contain both water and n-octane. The compositions of the exit streams of the extraction unit are linked by the distribution coefficient (K), which is the ratio of the mole fraction of MEK in the exit n-octane stream to the mole fraction of MEK in the exit water stream. (Repeat: the distribution coefficient relates mole fractions, while other specifications in the problem are mass fractions). At the temperature and pressure of the operation, K=0.35. Calculate the molar flow rate of n-octane (in mol/hour ) needed for the extraction. Before you start, prove that you have enough information to solve this problem. If (and only if) you don't have enough information yet, take another process specification that 60% of the incoming moles of MEK are to be extracted into the n-octane stream. If you already had enough information, disregard the last sentence