A six cylinder, four-stroke, spark ignition engine of bore \(10 \mathrm{~cm}\) and stroke \(12 \mathrm{~cm}\) with a compression ratio of 6 is tested at \(4800 \mathrm{rpm}\) on a dynamometer of arm \(55 \mathrm{~cm}\). During a 10 minute test, the dynamometer reads \(450 \mathrm{~N}\) and the engine consumes \(5 \mathrm{~kg}\) of petrol of calorific value \(45 \mathrm{MJ} / \mathrm{kg}\). The carburettor receives the air at the rate of \(10 \mathrm{~kg} / \mathrm{min}\). Calculate:

(a) Brake power,

(b) BSFC,

(c) BMEP,

(d) BSAC,

(e) brake thermal efficiency, and

(f) air-fuel action.