At 20C, water is flowing through a pipeline and entering a horizontally oriented narrow elbow, changing direction at an angle of 30, and exiting. The inlet diameter of the elbow is 146.3 mm, and the outlet diameter is 101.4 mm. The mass flow rate of water in the pipeline is 36 kg/s. The outlet pressure is 150 kPa gauge. Neglecting frictional losses, find the inlet pressure and the resultant force on the fluid in the control volume."