quickly please

a. A four-cylinder, four-stroke spark-ignition engine has a bore of 72mm, a stroke of 80mm, a compression ratio of 7.5 and a top speed of 3200rpm. This engine works in the standard atmospheric conditions of 20C,1.03 bar and operates on an excess air coefficient of 1.15 and uses a fuel of a calorific value of 42.3MJ/kg(A/F)st= 15.2. Consider the following: charge pressure losses in the inlet system =0.084 bar, mixing with exhaust gases rise =63C, combustion chamber wall temperature rise =42C, charge temperature drop due to fuel evaporation following injection = 14C,1.th=0.68standard and m=89%. Evaluate the volumetric efficiency, bsfc and bmep. Also, evaluate the indicated power and brake power if the engine was taken to a hill top with a reduction of 10% in its volumetric efficiency while its speeds increased by 20%. (7 Points)