The components of an electronic system dissipating 220 W are located in a 1-m-long horizontal duct whose cross section is 16 cm x 16 cm. The components in the duct are cooled by forced air, which enters at 27°C at a rate of 0.65 m^3/min. Assuming 85% of the heat generated inside is transferred to air flowing through the duct and the remaining 15% is lost through the outer surfaces of the duct, determine
(a) the exit temperature of air and
(b) the highest component surface temperature in the duct.