1.43 A 2.5-m-tall steel cylinder has a cross-sectional area of 1.5 m². At the bottom, with a height of 0.5 m, is liquid water; on top of which is a 1-m-high layer of engine oil. This is shown in Fig PL.43. The oil surface is exposed to atmospheric air at 101 KPa. What is the highest pressure in the water?