A small centrifugal pump, when tested at \(N=2875 \mathrm{rpm}\) with water, delivered \(Q=0.016 \mathrm{~m}^{3} / \mathrm{s}\) and \(H=40 \mathrm{~m}\) at its best efficiency point \((\eta=0.70)\). Determine the specific speed of the pump at this test condition. Sketch the impeller shape you expect. Compute the required power input to the pump.