Critique on structure and proportion

hhey first time posting!
Drawing only female read models with pen and paper, 7 poses for 2 min and 3 more poses with as much time as i need.
The goal of this practice was accuracy of orientation of the major masses of the body and proportion. I had difficulties with n°9 because of the sideview and overlapping of shape (with the pelvis, the bent leg and arm). I’d like to find a better way to draw joints for limbs cuz it can get a bit convoluted especially when bent.
Feel free to critique, and suggest ways of drawing joints.

https://drive.google.com/file/d/1rO0mXvksthqO-yfZ3brk-bIyl_9C3F3X/view?usp=sharing
https://drive.google.com/file/d/1SbwGsW6-66WBAL6zr45lQ5wiqoehnabv/view?usp=sharing