Water enters a heat exchanger at 180 F and 20 psia and leaves at 160 F and 19.8 psia. Air enters the heat exchanger at 70 F and 15 psia and leaves at 100 F and 14.7 psia. The mass flow rate of the water is 40 lb_m/min. Determine the heat-transfer rate (Btu/min) to the air and the air mass flow rate (lb_m/min).