Here are my guesses. I could be wrong; it’s a little hard to tell in pictures as opposed to real life.
One of the 'males' is in red text - that means nothing; it was just an accident.
At this age, the feather growth, especially on the wings, is the easiest way to tell. I would guess that the ones that have larger primary sprouts are females and the ones with wings just starting to develop are males.
At 5 weeks you should be able to see a difference in their feet and legs. Drakes of course have bigger feet and legs and a wider stance. Drakes chest will stick out and their underline from leg to tail is flat. Females look 'petite and feminine'... smaller heads, beaks and body length.