The liquid nitrogen (N2) in a tank is pressurized by gaseous N2, and the pressure is measured by a multi-fluid manometer as shown in figure below. The tank is located

in a lab where the atmospheric pressure is 85.6 kPa. Determine the N2 gas pressure in the tank if h1 = 0.1 m, h2 = 0.2m, and h3 = 0.35 m. Take the specific gravity of liquid N2,oil, and mercury to be 1, 0.850, and 13.6,respectively.