A chemical plant needs to evaporate 10,000 kg/h of water from a wastewater stream that contains 5% solids. The plant has a triple-effect evaporator with three effects in series. Each effect has a heat transfer area of 100 m^2 and operates at a vacuum pressure of 50 kPa. The feed enters the first effect at 25degC and the heating steam pressure is 150 kPa, with a temperature of 15degC. The condensate leaves the last effect at 80degC and is sent to a cooling tower to remove the remaining heat. Assuming the heat transfer coefficient is 800 W/m^2K and neglecting any heat losses, calculate: a) The total steam consumption in kg/h to evaporate the water. b) The overall evaporation rate in kg/m^2h.