3) Air at standard conditions enters the compressor shown in Fig. Q3 at a rate of 0.3m3/s. It leaves the tank through a 3 cm diameter pipe with a density of 1.8 kg/m3 and the uniform speed of 210 m/s. (a) Determine the rate (kg/s) at which the mass of air in the tank is increasing or decreasing; (b) Determine the average time rate of change of air density within the tank. Tank Volume is 0.6m^3