https://docs.google.com/document/d/1vHcQViuVlIF0VL5_Y3g2x2ncf7ZQbMrwefoTqcqm2RI/edit#

https://docs.google.com/document/d/14xIcu_1HAifNnJIhXrTqrXovAYY0UHhpKjq6jGa9_Gk/edit