If a bond has a face value of $$1000,$ current price of $$900,$ has a $7\%$ coupon rate which is paid quarterly and $10$ years to maturity. What must be the martect rate $($or YTM$)?$

$B\mathrm{.}4B\%$

$6\mathrm{.}57\%$

$3\mathrm{.}24\%$

$2\mathrm{.}12\%$