Consider the same 30-year US Treasury bond in question 1. When the bond is priced at $92.8480 and has a 3.25% yield, its duration is 19.6 and its convexity is 512. a) Use duration to estimate the percent change in the price of this bond when the yield increases to 4.25% from 3.25%. b) Use duration to estimate the percent change in the price of this bond when the yield declines to 2.25% from 3.25%. c) Use the Taylor series approximation to estimate the percent change in the price of this bond when the yield increases to 4.25% from 3.25%. d) Use the Taylor series approximation to estimate the percent change in the price of this bond when the yield declines to 2.25% from 3.25%. e) What do you observe about your results in a), b), c) and d)? You must explain your answers clearly