A four-stroke diesel engine (two revolutions per mechanical cycle) runs at 3500 RPM and has eight cylinders, each with a bore of 8 cm and a stroke of 10 cm. The compression ratio is 22:1, the pressure and temperature at the start of compression are 100 kPa and 300 K, respectively. The maximum temperature reached is 2000 K. Using cold air properties, determine a) the thermal efficiency and b) the total power output of the engine.