4- A single-acting air compressor supplies 0.1 m³/s of air measured at, 273 K and 101.3 kN/m²which is compressed to 380 kN/m² from 101.3 kN/m². If the suction temperature is

289 K, the stroke is 0.25 m, and the speed is 4.0 Hz, what is the cylinder diameter? Assuming the cylinder clearance is 4 per cent and compression and re-expansion are isentropic (y = 1.4), what are the theoretical power requirements for the compression?