0.0 0.5 3. Single Stage Leaching A countercurrent leaching system is to be used to remove oil from a solid material using a solvent. The table below provides experimental results that relate the mass of inert solid per mass of liquid (N) versus the mass fraction of oil (mass of oil per mass of solution). The solid material fed to the leaching process contains 50 weight percent oil. N 0.75 0.65 0.1 0.55 0.3 0.50 0.45 0.7 a) Plot the N versus x-y data on the graph paper provided and label the underflow and overflow: b) Calculate Lo and label it on the plot: c) 100 kg/hr of the solid material (including the oil) is fed to the leaching process, where it is contacted with the same mass flow rate of solvent. If the solid material is contacted with the solvent in a single stage, identify the resulting recovery of the oil (amount in the overflow relative to the original amount in the solid) and identify the concentration in the underflow and overflow (assume x = y for equilibrium between the underflow and overflow)