Consider the steady flow of air through a control volume. Two streams enter, one at 350 kPa, 150 C with low velocity at 0.025 kg/s; the other enters at 350 kPa, 15 C also with low velocity. A single stream of air exits at 100 kPa, - 40 C through a pipe with 25mm diameter. The control volume rejects heat to the surroundings at the rate of 1.2 kW and produces 4.5 kW of power output. Determine the flow rate of second stream of air that enters.