Question $13$

A $2\mathrm{.}00$ kg object on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is $\backslash (5\mathrm{.}00\backslash$mathrm$\{$~N$\}/\backslash$mathrm$\{$m$\}\backslash ).$ The object is displaced $3\mathrm{.}00$ m to the right from its equilibrium position and then released from rest, initiating Simple Harmonic Motion. What is the force $($magnitude and direction$)$ acting on the object $3\mathrm{.}50$ s after it is released?