A Brayton cycle gas turbine engine has a pressure ratio of 12 , a compressor inlet temperature of 300K, a turbine inlet temperature of 1,000K. The net power output is 70MW. You will analyze two different scenarios: Case 1: Both the compressor and turbine are isentropic Case 2: The compressor and turbine both operate at an efficiency of 85% Show the cycle(s) on both a T-s and a P-v diagram and calculate: a. turbine exit temperature b. mass flow rate c. thermal efficiency d. back-work ratio (answer for isentropic turbine/compressor: 492K,352kg/s,51%,0.61 ) (answer for 85\% efficient turbine/compressor: 568K,1,037kg/s,20%,0.84 )