a feed containing equimolar amounts of methanol and water is mixed with 10 moles of a 40% mol aqueous methanol stream. the mixture enters a first separation unit that creates two streams. a top stream exits the separation unit that contains 70% mol methanol and rest water. the bottom stream, which is 70 moles enters a second separation unit. A top stream exists the second separation unit as a 50% methanol & 50% water mixture. the other stream is unknown. if the fresh feed to the system is 100 moles (equimolar mixture) and the two top streams exiting the separation units have the same flow, draw the flow sheet and find the molar flow and the composition of the bottom streams existing the second separation unit?