A stream of moist air is obtained by mixing a 1500 ft³/min flow of air at 26.7 °C (80 F) and 80% relative humidity with a 500 ft³/min flow of air at 15.6 °C (60 F) and 50% relative humidity. The mixing is adiabatic and occurs at constant pressure (1 atm). Determine the temperature (°C), humidity ratio, and relative humidity of the exit stream.