On January $1$ of Year $1,$ Congo Express Airways issued $$3,500,000$ of $7\%,$ bonds that pay interest semiannually on January $1$ and July $1.$ The bond issue price is $$3,197,389$ and the market rate of interest for similar bonds is $8\%.$ The bond premium or discount is being amortized using the straight$-$line method at a rate of $$10,087$ every six months. The life of these bonds is:

Multuple Cholce

$15$ years.