https://docs.google.com/presentation/d/1dHTGxXagV4L0gN3Phfc4_FGhyY7RKO89ta3nS74n08U/edit?usp=sharing

https://docs.google.com/presentation/d/15MndW6Nd65Bq9a-LbAqrmAdxXmAZGOyJ/edit?usp=sharing&ouid=114149998850712867723&rtpof=true&sd=true