[vhpk]

Hi everyone,
I've got a question needed your help.
A 22% sodium chloride solution is to be pumped up from a feed tank into a header tank at the top of a building. If the feed tank is 40 m lower than the header and the pipe is 1.5 cm in diameter, find
a/ e velocity head of the solution flowing in the pipe
b/ the power required to pump the solution at a rate of 8.1 cubic metres per hour. Assume that the solution is at 10°C, pipeline losses can be ignored, the pump is 68% efficient, and that the density of the sodium chloride solution is 1160 kg m^-3
For part a, is that true to say that all the PE will be converted to KE so we can deduce the velocity ?
For part b, I take the energy per unit of mass multiply with the mass flow rate and 1/density to get the final answer.
However, I need your help with part a since it's related to part b. Thank you a lot .