Consider an ideal Ericson cycle with air as the working fluid executed in a steady flow system. Air is at 27 oC and 120 kPa at the beginning of the isothermal compression process, during which 150kJ/kg of heat is rejected. Heat transfer to air occurs at 1200 K, and a turbine inlet temperature of 1000 K. Determine the required mass flow rate of air for a net power output of 70mW, assuming both the compressor and the turbine have an isentropic efficiency of i) 100 percent ii) 85%