5. An air-standard Otto cycle operates with compression ratio r=10. Before the compression step (state point C) TC =35oC and PC=95 kPa. The heat input is 650 kJ/kg. Calculate the thermal efficiency of the cycle, the T and P of all state points, the net work and the air entropy changes for all steps in the process. Use constant heat capacities for air (Cp = 3.5R, Cv = 2.5R).