16. A centrifugal compressor compresses air at ambient temperature and pressure of 288 K and 1 bar respectively (stagnation values). The impeller tip speed is 364 m/s, the radial velocity at the exit from the impeller is 28 m/s, and the slip factor is 0.89. The power input factor is equal to 1.0. Calculate: a) the work done, b) stagnation temperature at the impeller outlet, c) the absolute air velocity at the impeller outlet, and d) the Mach number of the absolute flow at the impeller tip. [Assume an axial entrance at the impeller eye and radial blades.]