https://docs.google.com/presentation/d/1EVhwiPbOA39Tk3NSr-rEB7rt4D48B7lGZUAsSuF5_k0/edit#slide=id.g31e07cdba2_0_48
https://docs.google.com/presentation/d/1J5nfXTC-_IoC5xvaWjLirPrtTrr9l7hR_oepeTSjRT8/edit#slide=id.g347f074b91_0_17
https://docs.google.com/presentation/d/15lK6PO5QRC0DlblLJAgQZDEZPfuX4QN56jgSwH7Vkro/edit#slide=id.p
https://docs.google.com/document/d/1FsmN1P1K6qdZcUNSsiG7iMjRTIaU92l8sopug9BtLEA/edit