c) A four cylinder, 4 stroke internal combustion engine has a bore of 60mm and a stroke of 70mm. At a test speed of 3000 rev/min it is operated against a brake which has a torque arm of 0.40m and the measured brake load is 160N. Calculate: i) The engine torque ii) The brake power 383 The bmep. iv) The imep. assuming that the mechanical efficiency of the engine is 0.85.