https://docs.google.com/presentation/d/18C6vMx8tg1eMpa179vaht2VUP6VHM761G8TKr7xT3aw/edit?usp=sharing
https://docs.google.com/document/d/1rSIrT9-ZYX0nEFTxx077CZPIBrw8m91olXBf0BL_r0U/edit?usp=drive_link