pls show work and include degrees of freedon analysis

4-28. In a glycerol plant, a 10% (mass basis) aqueous glycerin solution containing 3% NaCl is treated with butyl alcohol as illustrated in Figure 4.28. The alcohol fed to the tower contains 2% water on a mass basis. The raffinate leaving the tower contains all the original salt, 1.0% glycerin and 1,0% alcohol. The extract from the tower is sent to a distillation column. The distillate from this column is the alcohol containing 5% water 10% glycerin 95% alcohol 1000 lb/hr extract extraction tower distillation column 23% glycerin raffinate 98% alcohol 1000 lb/hr Figure 4.28. Solvent extraction process The bottoms from the distillation column are 25% glycerin and 75% water. The two feed streams to the extraction tower have equal mass flow rates of 1000 lbm per hour. Determine the output of glycerin in pounds per hour from the distillation column