charla
https://docs.google.com/presentation/d/1GpfJdKyEMaDqB1cq4S_gzE-pUCCoTJ9u/edit?usp=sharing&ouid=102848727764241018826&rtpof=true&sd=true
https://docs.google.com/presentation/d/1GpfJdKyEMaDqB1cq4S_gzE-pUCCoTJ9u/edit?usp=sharing&ouid=102848727764241018826&rtpof=true&sd=true