THE ANSWER IS 1532.4 kg/h. Please show all your working.

D3.* A distillation column separating ethanol from water is shown in the following figure. Pressure is 1.0kg/cm2. Instead of having a condenser, a stream of pure liquid ethanol is added directly to the column to serve as the reflux. This stream is a saturated liquid. 2000.0 kg/h of feed at 20C that is 40.0wt% ethanol is added. Distillate concentration is 80.0wt% ethanol, and bottoms composition is 5.0 wt % ethanol. A total reboiler is used, and the boilup is a saturated vapor. The cooling stream is input at C=1000.0kg/h. Find the external boilup rate, V. Note: Set up the equations, solve in equation form for V, including explicit equations for all required terms, read off all required enthalpies from the enthalpy composition diagram (Eigure 2-4), and then calculate a numerical