Alright, so here's what I've got:

One of the things I noticed is that you didn't draw a line down vertically (sometimes horizonally) down to the center of your ghosted planes. What I mean is demonstrated here. Please draw these in before moving on (as they were part of the instructions), but there's no need to post them.

On your superimposed lines, you do fray, but that's bound to happen. However, there are some times where you do fray on both ends. Make sure to position the point of your pen to the start of the drawn out line before executing it.

Overall, your lines do tend to wobble, so I advise that you to keep this in mind when you continue. Aim for confident strokes. Otherwise nice work, you can continue on to the ellipses section, after you draw in those lines for your planes. ^^