4) Consider a jet engine with air entering the turbine at T4 = 1177 °C and 5 MPa. The pressure ratio in the turbine is pressure ratio is 8. The

mass flow rate of air is y/10 (kg/s). a. Find the density of the air at the entrance of the turbine. b. Using an air-standard (no fuel and variable specific heats) to find the power of the turbine.