The single-acting reciprocating pump in the figure lifts water from the sump and delivers it freely into a measuring tank. Bore, stroke, crank speed, suction and delivery heads and the measuring-tank reading are marked on the figure. Determine (a) the theoretical discharge (answer in L/s), (b) the percentage slip (answer in %) and (c) the shaft power required, taken as the theoretical power ρgQ_{th}(h_{s} + h_{d}) divided by a mechanical efficiency of 80 % (answer in kW).