An air conditioner takes in outdoor air at 100c and 30% relative humidity at a steady rate of 45m3/min and conditions it to 250c and 60% relative humidity. the outdoor air is first heated to 220 c in the heating section and then humidified by the injection of hot steam in the humidifying section. assuming that the entire process takes place at a pressure of 1 atm, determine: (1) the rate of heat supply in the heating section and (2) the mass flow rate of the steam in the humidifying section.