A heating section consists of a 30 cm diameter duct which houses a 6 kW electric resistance

Question:

A heating section consists of a 30 cm diameter duct which houses a 6 kW electric resistance heater. Air enters the heating section at 1 atm, 15oC and 33% relative humidity at velocity 8.5 m/s. Determine
(a) The exit temperature (T2),
(b) The exit relative humidity of the air and
(c) The exit velocity (V2).