What is the duration $($D$)$ of a corporate bond with coupon rate of $8\mathrm{.}94\%,$ if the market rate is currently $4\mathrm{.}43\%$ and the term is five years $($assume the face value is $$1,000)?$ Please enter your response to the nearest $100$th of a year $($for instance $4\mathrm{.}56$ years$).$