https://docs.google.com/document/d/1wghHDgaE7AvTza5V9MKnSw6yxArPnqByD-1CXzwVll8/edit?usp=sharing

https://docs.google.com/document/d/1g7gbwacxL9k9ZR0GLQVs0IjJW0YSyp7DR1sEG-uNAKE/edit?usp=sharing