AE 433 Consider a single stage of a compressor. At the radial location r= 0.75 m, the rotor rotational speed is 2500 rpm, To = 350 K, C1z = C2 = 150 m/s, a = 35°, Bz = 10°, where subscripts 1and 2 refer to locations upstream and downstream of the rotor, respectively. The variables have their usual meaning. 

a. (15pts) Draw the velocity diagrams (triangles) upstream and downstream of the rotor. Draw the velocity diagrams on top ofeach other, labeling the relevant angles and velocities. 

b. (10pts) Calculate the stage specific work. 

c. (Spts) Calculate the stage pressure ratio assuming it has efficiency of 90%