a) State the four main principles of engineering ethics. b) State the three main methods used in accidents and loss statistics for measuring the effectiveness of safety programmes. c) The UK Legislative structure is multi-layered. State the difference between Enabling Acts,Regulations or Statutory Instruments, Guidance Notes and Codes of Practice. d) What is a source model? Give two examples of source models. What information can be obtained from source models? e) Explain how liquid flow rate through a hole in a vessel is calculated. What are the main contributions to the overall pressure driving the fluid out of a vessel for an aperture of a given area?