Moist air at 90 F, 14.7 psia, and 80% relative humidity is removed from the top of a large room at a rate of 500 ft³/min. The air is then cooled in an air conditioner at constant pressure to 60 F and returned to the bottom of the room. Condensed moisture leaves the air conditioner at 60 F and 14.7 psia. Determine 

(a) The rate of moisture removal (gal/hr) by the air conditioner.

(b) The heat-transfer rate (Btu/min) rejected by the air conditioner.