How to solve a Rubik's cube 6x6 - Step 6

At the beginning of this stage you should have two layers assembled. Turn the cube over as shown in the picture.

At the end of the stage the cubes of the top cross must be in their place, at the same time, their colors can be inverted.

Apply the formulas of the fourth step of assembly the 3x3 cube. You have to rearrange the middle ribs of the top edge until they are all in place, and it doesn't matter how they are turned!