A pump draws water from reservoir A and lifts it to a higher reservoir B, as shown

Question:

A pump draws water from reservoir A and lifts it to a higher reservoir B, as shown in Figure P4.2.6. The head loss from A to the pump is four times the velocity head in the 10 cm pipe, and the head Joss from the pump to B is seven times the velocity head. The pressure head at the inlet of the pump is -6 m. Compute the pressure head the pump must deliver. Why is the pressure head the pump must deliver greater than 50 m, the elevation difference between the two reservoirs? Draw the EGL and HGL.