Based on the answers provided, here are the corrections needed for the 3D object:

1. Make sure the table has four legs. If there are more or less, adjust accordingly to ensure there are exactly four legs.
2. Change the shape of the legs from cylindrical or rod-like to extruded squares. This will make the legs square in cross-section.
3. Ensure that each leg of the table is linked directly to the bottom of each corner of the rectangle. If they are positioned independently of the top surface, adjust their position so they are directly attached to the corners.