Find the duration of a $7\mathrm{.}6\%$ coupon bond making semiannually coupon payments if it has three years until maturity and has a yield to maturity of $7\mathrm{.}6\%.$ What is the duration if the yield to maturity is $12\mathrm{.}0\%?$

Note: The face value of the bond is $$1,000.$ Do not round intermediate calculations. Round your answers to $2$ decimal places.