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Derive the MBE for a tank with rigid and incompressible walls (i.e. tank volume remains constant regardless of the fluid pressure inside) for the cases of different conditions shown below. The tank is initially full of oil and water at pi. Some oil is bleeded to reduce the pressure to pl. Then, WI amount of water injected into the tank at p2 The The removed oil from the tank is collected as Np STB of oil and Gp SCF of gas at surface conditions. We also know that pi-p2-pl>pb. N, G, oil oil water water W.