A pipe carrying oil of specific gravity (SG = 0.877) changes in size from 150 mm at section E to 450 mm at section R (E and R are arbitrary designations of the two points in the system). Section E is 3.66 m lower than R, and the pressures are 91.0 kPa and 60.3 kPa at sections E and R respectively. If the volumetric flow through the pipe = 0.146 m3/s, calculate flow velocities at each section, then determine: (a) head loss through this pipe section, and (b) the direction of flow.