In regards to the cylinders around arbitrary minor axes, your work is considerably improved. You're varying your rates of foreshortening well, and also avoiding cases where the side edges are drawn as parallel on the page. I did notice that for the first half of your cylinders or so, you appeared not to draw your side edges with the ghosting method, which was unwise to say the least (and technically falls short of delivering the best of which you are currently capable), but I see that you did catch this on your own and corrected it in many of those in the latter half. Still, do take care to consider what techniques and strategies we've introduced throughout the course, as you are expected to continue to apply them going forward, and that extra mileage (along with practicing these things in your warmups) is a big part of having it become second nature.

As to the cylinders in boxes, your work here is very well done, and I have no complaints. This exercise is really all about helping develop students' understanding of how to construct boxes which feature two opposite faces which are proportionally square, regardless of how the form is oriented in space. We do this not by memorizing every possible configuration, but rather by continuing to develop your subconscious understanding of space through repetition, and through analysis (by way of the line extensions).

Where the box challenge's line extensions helped to develop a stronger sense of how to achieve more consistent convergences in our lines, here we add three more lines for each ellipse: the minor axis, and the two contact point lines. In checking how far off these are from converging towards the box's own vanishing points, we can see how far off we were from having the ellipse represent a circle in 3D space, and in turn how far off we were from having the plane that encloses it from representing a square.

In applying your line extensions thoroughly and correctly, you've given yourself ample information to work with in assessing how to adjust the proportions of your next set of boxes, and even with this more limited homework set, I can see that your ability to judge your proportions have improved.

I'll go ahead and mark this challenge as complete, but be sure to continue including them in your regular warmup rotation.