A supply of 10 lbm/s ammonia at 80 lbf/in 2, 80 F is needed. Two sources are available one is saturated liquid at 80 F and the other is at 80 lbf/in 2, 260 F. Flows from the two sources are fed through valves to an insulated SSS F mixing chamber, which then produces the desired output state. Find the two source mass flow rates and the total rate of entropy generation by this setup.