Your line exercises look great. The lines are confident and have no wobble.

Your ellipses look good... although its hard to tell. The images you uploaded are very low-res so I cant tell if you went over the ellipses more then three times or not. Next time, upload higher res images if you can, and if you did go over your ellipses more then three times, remember to only go over twice.

Once again, its hard to tell, but it looks like some of the horizontal lines in your rough perspective exercise are not parallel to the edges of the frame. But it also looks like you realized this and fixed it in later attempts, so nice job. Other then that, the perspective exercises look good, especially the organic perspective one.