https://docs.google.com/presentation/d/1bsbBxpwBoHMYg5cpfVKk1wKKcbJnjPt5/edit?usp=sharing&ouid=115752960614001975546&rtpof=true&sd=true

https://docs.google.com/presentation/d/19HK0mbpGdMcCgEy1rnoROH0AagtXHKFg/edit?usp=sharing&ouid=115752960614001975546&rtpof=true&sd=true