Determine the magnitude of the applied vertical forces $F$ and $-F$ required to pull point A away from point $B$ a distance of $y=$

$1\mathrm{.}8ft.$ The ends of cords CAD and $CBD$ are attached to rings at $C$ and $D.$

Express your answer to two significant figures and include the appropriate units.

$F=$

When $y$ is zero, the springs sustain a force of $56lb.$

$($Figure $1)$