please make final answers clear

A two-year, $1,000 (i.e., face value) bond that pays a semi-annual coupon of 10 percent and trades at a yield of 8 percent. What will be the change in price and the new price using the duration model if interest rates decrease to 7.5 percent? P=$9.29;P=$1027.01P=$9.29;P=$1045.59P=$9.29;P=$1009.29P=$9.66;P=$1026.64P=$9.66;P=$1045.96 What is the duration of a consol bond that sells at a yield to maturity of 8 percent? 12 percent? 12.5 years; 10 years 11 years; 9.33 years 13.5 years: 9.33 years 12.5 years: 8.33 years 13.5 years; 11 years