https://docs.google.com/document/d/1ZUcpzifb-QpSR1m5qvXrW236LHZc9DfSiyaPTTDFKV0/edit

https://docs.google.com/document/d/1ba0qeQ5HzrQelW5HPgpg5kwgOxOJ3t_RCQtfdwLkWbM/edit