An investor buys a T$-$bill at a bank discount quote of $4\mathrm{.}80$ with $90$ days to maturity for $9,880\mathrm{.}00.$ The bill has a face value of $$10,000.$ The investor's bond equivalent yield on this investment is $\_\_\_\_\_.4\mathrm{.}93\%4\mathrm{.}86\%4\mathrm{.}79\%5\mathrm{.}10\%$