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 and ii) 85 percent. Assume constant specific heats at room temperature