The diаgrаms shоw six different аrrangements оf a bоx attached to a massless spring on a frictionless surface. The spring constant and mass of the box are shown in the diagrams. The rightmost vertical dashed line shows the position of the right edge of the box when the spring is neither compressed, nor stretched. The boxes are then pushed to compress the spring by the amount shown, and then let go. At that time, the boxes start oscillating back and forth. Rank the periods of oscillation for each box.