A single-stage, single-acting air compressor running at 1000 rev/min delivers air at 25 bar. For this purpose the induction and free air conditions can be taken as 1.013 bar and 15C, and the FAD as 0.25 m/min. The clearance volume is 3% of the swept volume and the stroke/bore ratio is 1.2/1. Calculate: (i) the bore and stroke; (ii) the volumetric efficiency; (iii) the indicated power: (iv) the isothermal efficiency. Take the index of compression and re-expansion as 1.3.