Q$4)$ For the pipeflow system shown in Fig. below the following data are available:

$\backslash$table$[[$Item$,$Point $1,$Point $2],[$Diameter $(cm),20,30],[$Elevation $($m$),103,106],[$Pressure $($kpa$),55,75],[$Velocity$,2\mathrm{.}5,-]]$

Determine the loss of energy between these two points.