Ahelium compressor the relative mach number is mr/s=0.85 at the shroud of the impeller. the inlet stagnation pressure and temperature are 101.325 kpa and 288 k. the mass flow rate is 1.8 kg/s. the hub- to-shroud radius ratio is 0.38, and the inlet flow is axial. determine; (a) the rotational speed of the impeller, (b) the axial velocity, and (c) the inducer shroud diameter, assuming that the inducer is designed for optimum relative flow angle, and that the compressor operates at the design point.