A 380 cc single-cylinder two-stroke motorcycle engine is operating at 5500 rpm. The engine has a bore of 82 mm and a stroke of 72 mm. Performance testing gives a bmep od 6.81 bar, bsfc of 0.49 kg/kW hr, and delivery ratio of 0.748. a) What is the fuel to air ratio? (b) What is the air flow rate (kg/s)?