Dayo buys a bond for $696.47. The only thing we know about the bond is its Macaulay duration which is 5.681. The current effective annual rate is 3.75%. 5 marks each. a) Using the first order Macaulay price approximation, how big a change in interest rates would it take to make the price of this bond go up by $1? b) Using the first order Modified price approximation, how big a change in interest rates would it take to make the price of this bond go up by $1?