Question 4 a) What is the underlying premise in using Discounted Cash Flow (DCF) to evaluate project investment decisions? (2 marks) (8marks) b) Consider the following 2 machines in Table Q4b below. Using the tables provided, calculate Equivalent Annual Value to ascertain which machine is the best investment. Assume an interest rate i of 5%. TableQ4b Machine Life (Years) Initial Cost 5500 Scrap Value 850 Annual Benefits 1150 Machine 1 5 Machine 2 5000 1050 1200 4 (5marks) c) A graduate engineer intends to take out a mortgage for 240,000. Determine the annual repayments if the period of the loan is 25 years and the interest rate is 5%. Show how the annual repayments change if the term of the loan is increased to 30 years, and the interest rate remains the same. d) Briefly outline the obligations of Engineers under Engineers Ireland Code of Ethics. (6marks) (4 marks) e) Outline two examples of ethical dilemmas which an Engineer might face in the workplace