slides

https://docs.google.com/presentation/d/1xuq1oCPXOCtbzYZht5mLQ-t45yaVERHfiThWER5lI8U/edit?usp=sharing

https://docs.google.com/presentation/d/1ycfWnSHalymnHhSMM22MSzbZqOdXE71_TR6r9vBkLPk/edit?usp=sharing