b. In a mixture to be fed to a continuous distillation column, the mole fraction of phenol is 0.35 , a-mio/ is 0.15 , m.mesol is 0.30 and x flemols is 0.20 . A product is required with a mole fraction of poeno/ of 0.952 , o-medi/0.0474 and m-aresol 0.0006 . If the volatility to o-arsol of phenol is 1.26 and of m-arsol is 0.70 , estimate how many theoredical plates would be required at total reflux. [16 Marks] Moyygen=81.999M42=28.012MAr=39.948M02=44.010