Problem $13\mathrm{.}072-$ Collar along a circular rod

A $1-$lb collar is attached to a spring and slides without friction along a circular rod in a vertical plane. The spring has an undeformed length of $5$ in $.$ and a constant $k=22l\frac{b}{f}t.$ Knowing that the collar is released from being held at $A,$ determine the speed of the collar and the normal force between the collar and the rod as the collar passes through $B.$

The speed of the collar and the normal force between the collar and the rod as the collar passes through $B$ are $f\frac{t}{s}$ and

lb $|$

$,$ respectively.