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

1. Increase the size of the second trapezoid so that it is larger than the first one. This can be done by extending the non-parallel sides of the second trapezoid while keeping the parallel sides the same.

2. Ensure that both trapezoids are right trapezoids. This can be achieved by adjusting the angles at the vertices such that each trapezoid has at least one right angle.