Refrigerent-134a enters a 28 cm diameter pipe steadily at 200 kPa and 20 degrees Celcius with a velocity of 5 m/s. The refrigerant gains heat as it flows and leaves the pipe at 180 kPa and 40 degrees Celcius. Determine: a) the volume flow rate of the refrigerant at the inlet, b) the mass flow rate of the refrigerant, c) the volume flow rate of the refrigerant at the exit, d) the velocity of the refrigerant at the exit.