Cold air enters an air conditioner at 4.4 °C (40 F) with 50% relative humidity at a volumetric flow rate of 1000 ft³/min. The air is then heated. Next, moisture at 21.1 °C (70 F) and 1 atm is added adiabatically to bring the air to 26.7 °C (80 F) with a 40% relative humidity. The entire process occurs at 1 atm. Determine 

(a) The rate of moisture addition to the air (kg/min)

(b) The heat-transfer rate (W)

(c) The air temperature (°C) after heating.