https://docs.google.com/presentation/d/1gzac4V37Fq_cHyt5ZB-XdxtKipuOzLDV7MIJjdEqEzo/edit?usp=drive_link
https://docs.google.com/document/d/1UK8ewdKu2RNgTP10IcQTP5eCdgG0sdJ8LkHHVF16G5k/edit?usp=drive_link