An axial compressor has a mean radius of 0.25 m and the absolute air angle at stator exit is 28.8°. the speed of the rotor is 8000 rev/min. the axial velocity is 70% of the blade speed and is constant throughout the stages. if the relative velocity ratio is 0.85, draw the velocity diagrams at rotor inlet and outlet, find the angles, and determine the power required to deliver 50 kg/s of air.