If you borrow $$15,000$ from your friend at a simple interest rate of $6\%$ and promisen to give back $$20,000,$ for how long can you have the loan?

Group of answer choices

$4\mathrm{.}5$ years

$5\mathrm{.}55$ years

$6\mathrm{.}75$ years

$7\mathrm{.}56$ years