1. **Is the base of the object square-shaped?**
   - **Answer:** Yes
   - **Reasoning:** From the images provided, the base of the object is visible and clearly has four equal straight edges and right angles, characteristic of a square shape.

2. **Is the object extruded along the Z-axis?**
   - **Answer:** Yes
   - **Reasoning:** The object shows a consistent cross-section along the height in the images, indicating that it has been extruded vertically along the Z-axis.

3. **Is there a smaller square at the top-right corner of the original square?**
   - **Answer:** Yes
   - **Reasoning:** In the images, there is a visible indentation or cut-out on the top-right corner of the object, which appears to be square-shaped.

4. **Is the smaller square approximately 1/5th the size of the original square?**
   - **Answer:** Unclear
   - **Reasoning:** Without specific measurements or scale references in the images, it is difficult to accurately determine the proportion of the smaller square relative to the original square.

5. **Does it appear as if a chunk is missing from the original extruded object due to the negative extrusion of the smaller square?**
   - **Answer:** Yes
   - **Reasoning:** The images show a recessed area or a negative space in the form of a smaller square at the top-right corner, suggesting that this portion has been negatively extruded from the original extruded object.