A $2\mathrm{.}37-kg$ object on a frictionless horizontal track is attached to the end of a horizontal spring whose force constant is $5\mathrm{.}00\frac{N}{m}.$ The object is displaced $3\mathrm{.}50m$ to the right from its equilibrium position and then released, initiating simple harmonic motion.

$($a$)$ What is the force $($magnitude and direction$)$ acting on the object $3\mathrm{.}50s$ after it is released?

magnitude

Your response differs from the correct answer by more than $100\%.$ N direction

$($b$)$ How many times does the object oscillate in $3\mathrm{.}50s?($Do not round your answer to an integer.$)$