An oil manometer ( = 860 kg/m3 ) is connected to a cylinder containing air. The difference in the level of oil between the two columns is 45 cm and !"# is 99 kPa. Calculate the absolute pressure of the air in the cylinder.

In every exercise, you must highlight your main assumptions, highlight the given data and unknowns, draw a sketch, present your equations in full form, and specify the units in every step. A brief discussion of your findings is encouraged.