In an air standard regenerative gas turbine cycle,the pressure ratio is 5.air enters the compressor at 1 bar ,300 k and leaves at 490 K.the maximum temperature in the cycle is 1000k. what is the cycle efficiency,given that the efficiency of the regenrator and the adiabatic efficiency of the turbine are each 80%assume for air ,the ratio of specific heats is 1.4.