2. An engineer in a large manufacturing facility observes that some unknown liquid has seeped into an open tank of lubricating oil. The mysterious liquid is not mixing with the oil and is resting at the bottom of the tank. He or she makes some measurements, and determines that the depth of the unknown liquid is 1.5 m, and that the depth of the oil is 5 m. The specific weight of the oil is known to be 8500 N/m, and a pressure gage connected to the bottom of the tank reads 65 kPa. Making appropriate assumptions, determine the following: (a) The specific gravity of the unknown liquid (-) (b) The density of the unknown liquid (kg/m)