A $4-$lb package is at rest in Position $1$ where the spring is compressed $5$ in $.$ When the spring is

released, the package moves up to Position $2$ where its speed is $v_2.$ For $h=3ft$ and neglecting friction,

the required spring rate to achieve $v_2=6f\frac{t}{s}$ is best given by$?$

Correct abswer is $13\mathrm{.}7$ as shown please probide detailed steps $|$