Moist air at 1 atm, 15°c, and 60 percent relative humidity is first heated to 20°c in a heating section and then humidified by introducing superheated water vapor. the air leaves the humidifying section at 25°c and 65 percent relative humidity. determine: a. the amount of steam added to the air, kg h2o/kg dry airb. the temperature of the added steam, in °cc. the amount of heat transfer to the air in the heating section, in kj/kg dry air