On a day with atmospheric pressure equal to 980 kPa, a manometer (u-tube) open on both ends is filled with water (Density= 1000 kg/m3) on one side and with oil (Density = 870 kg/m3) on the other side. When the fluid levels come to equilibrium, the oil water interface is at the exact lowest part of the curved tube, and the column of oil is 6.3 cm higher than the water. What is the height of the water column if the diameter of the manometer tube is 3.5 mm?