Scale Y: 0.25
Subdivisions Width: 3
Subdivisions Depth: 3
Select the center faces and delete them.
Using the Append Polygon Tool, attach the bottom edge to the top edge of the hole on all four sides.
Edit Mesh > Append Polygon Tool Select the first edge, then select the second edge, and then hit enter.
Select all the vertical and horizontal edges and bevel them with an offset of 0.1 units.
Change to Blin. Right Click on the object and Assign New Material. Choose Blin.
TURN IN 2 shots, both smoothed one selected showing wire frame.
Repeat last few steps and extrude the center face .25 units in the Translate Local Z.
