An air-standard Otto Cycle has a compression ration of 7.5. At the beginning of compression P1=85 kPa and T1=32 C. The mass of air is 2g and the max temperature in the cycle is 960K. Determine: 1) The Heat rejection in kJ. 2) the net work in kJ. 3) the thermal efficiency 4) the mean effective pressure in kPa