2. Air enters a converging-diverging nozzle with a velocity of 70 m/s at a pressure and temperature of 0.75 bar and -2 C respectively. After reaching the throat (A* : 0.15 m), the air expands isentropically until reaching a standing normal shock at an area of 0.3 m. The exit area from the nozzle is 0.7077 m. The air can be assumed to have constant specific heats, with k = 1.4. (Use the formal problem-solving template with the Known, Schematic & Given Data, and Find sections, and place your final answers in the boxes next to the corresponding part of the question). a) What is the mass flow rate (in kg/s)? = b) What is the temperature (in Kelvin) and pressure (in bar) at the exit? c) What is the velocity at the exit (in m/s)?