please solve in 30 mins

Ex. 2 750 A two-stroke internal combustion engine has a compression ratio of 8, and produces 4 kW at 2,000 rpm. The engine has 4 cylinders with a bore of 5 cm and stroke 8.9 cm. The engine follows an ideal Otto cycle. At the beginning of the cycle air is at 285 K, 100 kPa. Assuming constant specific heat capacities, determine: (a) the cycle efficiency; (b) the maximum temperature in the engine