Question 4 (20 marks) You can invest in the following 8-year bond with a coupon of 6% and a yield to maturity!discount factor of 4%. Year Year3 1 Year 41 Year 5TYear6T Year Year 1-1Year 2 1060 60 60 -60 60 60 60 Cash Flow (15 marks) a) Calculate the duration (you could also use the following table). Year 4-Year 5- Year 6 Year7 Year8_Total Year 3 60 Year 2 Year 1 1060 60 60 60 60 Cash Flow 60 Duration