GNT Co is considering an investment in one of two corporate bonds. Both bonds have a par value of $1,000 and pay coupon interest on an annual basis. The market price of the first bond is $1,079. Its coupon rate is 6% and it is due to be redeemed at par in five years. The second bond is about to be issued with a coupon rate of 4% and will also be redeemable at par in five years. Both bonds are expected to have the same yields to maturity. GNT Co considers duration of the bond to be a key factor when making decisions on which bond to invest. Estimate the Macaulay duration of the two bonds GNT