A hot-water stream at 80C enters a mixing chamber with a mass flow rate of 0.44kg/s where it is mixed with a stream of cold water at 20C. If it is desired that the mixture leave the chamber at 42C, determine the mass flow rate of the cold-water stream. Assume all the streams are at a pressure of 250kPa. The enthalpies are 335.02kJ/kg,83.915kJ/kg, and 175.90kJ/kg. The saturation temperature at a pressure of 250kPa is 127.41C. The mass flow rate is kg/s