written answer please

Water at 40C is flowing from A to B through the system shown in the accompanying figure. Determine the volumetric flow rate through the system if: - The vertical distance between the surfaces of the two reservoirs is 10m; - Both reservoirs are open to atmosphere; - The pipe diameters given on the drawings are the inside diameters; - The roughness of coated, ductile iron pipe can be taken as 1.2104m