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Problem 2: A packed column has the following dimensions: height Z=150cm, cross-sectional area S= 15cm2. The solute concentrations and flow rates are given in the following diagram. Use distribution coefficient K=xy=0.85. Assume the feed solution is dilute. Calculate the following quantities: a) the log-mean driving force, Dlog. (5 points) b) the number of transfer units, NOL. (5points) c) the height of a transfer unit HOL. (2 point) d) the product of mass transfer coefficient KOL and the contact area per unit volume a,(KOLa). (3 point) e) Plot the operating line and equilibrium line. (Optional, 0 point) Extract, V=2cm3/s,y1=0.025g/cm3 Feed, L=1cm3/s,x1=0.05g/cm3 Raffinate, L=1cm3/s,x2=0.001g/cm3 Solvent, V=2cm3/s,y2=0