Example $7\mathrm{.}1$: A centrifugal pump shown in figure below delivers $25\frac{L}{s}$ of water with a total system head o $15m.$ Determine for this pump the following heads and their percentage to the total head,

$($a$)$ Elevation head difference

$($b$)$ Velocity head difference

$($c$)$ Pressure head difference

$0\mathrm{.}10n0\%$