A closed cylindrical tank 2 m in diameter and 8 m deep with axis vertical contains 6 m deep of oil (sp. gr. = 0.8). The air above the liquid surface has a pressure of 0.8 kg/cm?. Determine the total normal force in kg acting on the wall at its location from the bottom of the tank. 2 m o Pa=0.8 kg/cm 6m Oil; s=0.8