The figure shows a spring in its equilibrium position at x = 0. The spring can

then be stretched, x > 0; or it can be compressed, x < 0.

The minimum value of the elastic potential energy stored by the spring is

Group of answer choices

when the spring is at its equilibrium position and x is zero.

when the spring is a a maximum compression and x is negative.

when the spring is at a maximum stretch and x is positive.