Much like the first, these images are all around decent, while having their own problems as well. The proportions on the top two measure up well, however the bottom one seems too long on it’s left side. The side corners on the bottom one could also use some work. The dip from the stand that the hip high image sat on is made visible, as is the folded corner on the shoulder high piece.
The shading on the corners is done well, but could have been used to define the corners better. Though I attempted at atmospheric perspective by using a white pencil, but the highlights got lost. The alternating black and white lines are inconsistent in size.
This exercise showed that you should continuously check the object you are drawing for proportions, relations, and scale before you start drawing, and even while you are drawing.