Two $4\mathrm{.}4$ kg masses are connected to each other by a spring with a force constant of $21\frac{N}{m}$ and a rest length of $1\mathrm{.}0$ m $.$ If the spring has been compressed to $0\mathrm{.}80$ m in length and the masses are traveling toward each other at $0\mathrm{.}60\frac{m}{s}($each$),$ what is the total energy in the system $($in J$)?$

$1\mathrm{.}58$ J

$2\mathrm{.}00$ J

$11\mathrm{.}6$ J

$12\mathrm{.}5$ J