Air enters the evaporator section of a window air conditioner at 14.7 psia and 90F with a

Question:

Air enters the evaporator section of a window air conditioner at 14.7 psia and 90°F with a volume flow rate of 200 ft3/min. Refrigerant-134a at 20 psia with a quality of 30 percent enters the evaporator at a rate of 4 lbm/min and leaves as saturated vapor at the same pressure. Determine
(a) The exit temperature of the air and
(b) The rate of heat transfer from the air.