7. A vertically oriented core, cylindrical in shape, is 35cm long with a 4cm radius and is saturated with water. The core stands 55cm above the datum with the outlet tube held 70cm above the datum. Plot the hydraulic head, elevation head vs. elevation using the diagram below as a guide. [10] 55 cm (not to scale) Datum 2-0 Elevation (m) 75 55 0 10 20 30 ++ 40 50 60 70 80 90 100 Head units (cm)