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a Q2 Consider a four-year bond with a face value of $100 and a coupon rate of 8%. The term structure of interest rates is flat at 5%, i.e. y = 5% for all t. a. Please calculate the duratio of this bond, and use the duration rule to estimate the change in price in dollars) if the term structure of interest shifts to 6%? b. What would be the actual price change? c. Could you please explain the approximation error of using duration rule by the price-yield curve and thus the relationship between yield and duration