A single acting single cylinder reciprocating air compressor running at 7.5rev/s, takes in air at 100 kPa, 270C. The compressor delivers air at 600 kPa at a flow rate of 0.12 m3/s measured at suction conductions. Given that the percentage clearance is 4 and that the index of compression and expansion is 1.2, calculate (a) the ideal volumetric efficiency and (b) the cylinder bore and stroke, assuming the bore/stroke ratio is 0.8.