For each of the two cases below, determine the water pressure, pressure head, elevation head, and total head at points A, B, and C. Please solve each case using: (a) the upper reservoir level as the datum; (b) the lower reservoir level as the datum. Present your step-by-step solutions and summarize your solutions in four tables. An example table is provided below. D 4 m 4 m Case (1) h (m) h, (m) P h, (m) u (kPa) 1 m 4 m 5 m A A B -4 m B C Case (2) 1 m C