Find the absolute pressure P_{1} acting on the closed-side surface of a manometer. In the first U-tube, fluid A (specific weight 10 kN/m^{3}) rises 5 cm from its surface under P_{1} to the A–B interface in the other arm. Above the interface, fluid B (specific weight 8 kN/m^{3}) runs over a loop (30 cm down and 30 cm back up) and ends at a free surface, open to the atmosphere, 15 cm above the A–B interface. The local atmospheric pressure is 758 mm Hg. (Answer in kPa.)