A bond's yield to maturity is 5.2% per year and its price is $971.55. The bond's modified duration is 4.3 years and its convexity is 168.4. By what percent will the bond's price change, if its yield to maturity increases by 250 basis points? 1)-5.5% 2) -6.7% 3) -6.2% 4) -5.1% 5) -4.6%