a. We are distilling 2000.0kg/h of a saturated vapor feed that is 45.0wt% ethanol and 55.0wt% water at a pressure of 1kg/cm2. Bottoms product is 0.01wt% ethanol, and vapor distillate from a partial condenser (see Problem 3.D8 for a description) is 88.0wt% ethanol. Reflux ratio (in mass flow rates) is L0/D=2.9. Reflux is a saturated liquid. A vapor side stream with yside=0.20 is withdrawn at a rate of 25.0 kg/h. Data are in Figure 2-4. Find D, B, QC, and QR. b. If feed flow rate is doubled, find D, B, QC, and QR