A steam turbine uses \(50,000 \mathrm{~kg} / \mathrm{h}\) of steam. The exhaust steam with dryness fraction 0.9 enters the condenser fitted with water extraction and air pumps. When the barometer reads \(76 \mathrm{~cm}\) of \(\mathrm{Hg}\), vacuum of air pump suction is \(72 \mathrm{~cm}\) of \(\mathrm{Hg}\) and temperature is \(32^{\circ} \mathrm{C}\). The air leakage is estimated at \(50 \mathrm{~kg} / \mathrm{h}\). Calculate

(a) Net capacity of air pump.

(b) Quantity of water circulated per minute if temperature rise is limited to \(15^{\circ} \mathrm{C}\).