The pressure ratio in the gas cycle used as the upper stage in a combined power cycle plant is given as 10. The air enters the compressor at 300 K and the turbine at 1200 K. The isentropic efficiency is taken as 0.87 in the compressor and turbine. An ideal Rankine cycle operating between 10 MPa and 150 kPa is run as the lower stage. The steam is heated in the waste heat boiler with exhaust gas up to 600 C. Exhaust gas also leaves the waste heat boiler at 400K degrees. Since the power output from the gas cycle is 150MW; a) Draw the operating diagram and T-s diagram of the system. b) Find the mass flow of exhaust gas and mass flow of steam used in the combined cycle. c) Find the power output from the steam stage. d) Find the total thermal efficiency of the combined cycle.