help question 3

Question 3 Water enters a piping system with a flowrate of 2000kg/s. The diameter of the pipe at the entry of the system is 90cm, and the diameter at the outlet is 66cm. The specific enthalpy of the fluid at the entry and exist of the system is 12.325J/kg and 8.44J/kg respectively. The fluid is then raised 9.2m before leaving the piping system (See figure 1). Determine the required specific shaft work from the pump in in J/kg. Assume that the density of water is 1000kg/m3