An ideal single-stage, single-acting reciprocating air compressor has a displacement volume of 14 litre and a clearance volume of 0.7 litre. It receives the air at a pressure of 1 bar and delivers it at a pressure of 7 bar. The compression and re-expansion are polytropic with an index of 1.3. Sketch the P-V diagram. Calculate the net indicated work of the cycle, volumetric efficiency, and [12 Marks] volume at all the state points in the P-V diagram.