Example 4 Air enters a converging-diverging nozzle at 1.0 MPa and 800 K with negligible velocity. The flow is steady, one-dimensional, and isentropic with k=1.4. For an exit Mach number of Ma-2 and a throat area of 20 cm2, determine: a. The throat conditions b. The exit plane conditions, including the area c. The mass flowrate through the nozzle