Steam at 3 MPa, 400C enters a turbine with a volume flow rate of 5m3/s. An extraction of 15% of the inlet mass flow rate exits at 600 kPa, 200C. The rest exits the turbine at 20 kPa with a quality of 90%, and a velocity of 20 m/s. Determine the volume flow rate of the extraction flow and the diameter of the final exit pipe.