water flows in a $0\mathrm{.}15$m diametr vertical pipe at rate of $0\mathrm{.}30$m$^3/$s and a pressure of $370$kpa at an elavtion of $25$ m$.$ determine $($a$)$velocity head at elevation of $20$m$,($b$)$pressure head at elevation of $20$ m$,($c$)$velocity head at elevtion of $55$m