https://docs.google.com/document/d/16i0Lr6OmlwIXH1gvZXqz-NnR-dhPo35QSVfCiudrUqU/edit
https://docs.google.com/document/d/12WK_GG_hvAfyg_nKWzPpQbIYvoTfvB1h0Px-9Bc3ZAg/edit
