Here are my assignments for this week! feedback would be greatly appreciated

Here are my assignments for this section of the Spine Anatomy lesson. Any feedback would be greatly appreciated!

Here are my assignments for this section of the Spine Anatomy lesson. Any feedback would be greatly appreciated!

Here are my assignments for this section of the Spine Anatomy lesson. Any feedback would be greatly appreciated!

Heres my work for the first two images. The leftmost drawing is my first attempt, by myself. The middle drawing is done while looking at Stan's answers. The rightmost drawing is my last attempt done by myself again. How did i do?

My first and second attempt were really close to one another, apart form the wrench shape

Here all 3 of my attempts, The first one was done by myself, the second was done while looking at Marshall's answer, and the third was done by myself again. Did I do well?

My first attempt without watching, i have question, if my first attempt is correct (perspective, form, gesture) but not the exact same line that the instructor drew, do i need to do a second attempt? Or should i do a second attempt regardless? Thank you!!