Based on the answers provided, the following corrections need to be made to the 3D object:

1. Replace the current block-like supports with two typical desk legs. This will address the issue raised in question 3.

2. Ensure that the length of each leg is approximately 1/3 of the length of the table. This will make the answer to question 4 clear and affirmative.

3. Make sure that both legs are extruded by the same amount as the table. This will clarify the answer to question 5.