Len is asked to design a small water pump for an aquarium. The pump should deliver \(18.0 \mathrm{Lpm}\) of water at a net head of \(1.6 \mathrm{~m}\) at its best efficiency point. A motor that spins at \(1200 \mathrm{rpm}\) is available. What kind of pump (centrifugal, mixed, or axial) should Len design? Show all your calculations and justify your choice. Estimate the maximum pump efficiency Len can hope for with this pump. Answers: centrifugal, \(75 \%\)