Explain the trend for each of the sets of results using the theory from the lectures.(ii) What is the significance of the results for an engineer choosing a pump to drive the circuit built from these of pipes? (2 marks)(iii) Suggest a pump characteristic for a system requiring a flow of 0.00025m3/s(2 marks)(iv) Why are the results for the smooth pipe of diameter 17mm and the rough pipe of diameter 17mm different?(2 marks)(v) Why are the results for the smooth pipe of diameter 17mm and the smooth pipe of diameter 13.6mm different?