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A storage vat has vertical ends 3.6 m apart, of which one end is shown below. Oil(s=0.84) is stored into it. Compute: (la) the force exerted by oil on this end in KN. (1b) the magnitude of the force exerted by oil on the curved DE in KN. (1c) the total weight of oil in KN. 0.9 m Oil (s=0.84) B 1.2 m 0.6 m C 0.6 m E