Please find the practical excercise available at this Google Docs link: https://docs.google.com/document/d/1fb9qjTfxhIfy7es87jJVpwQhg2840txx3768xEDQ5uM/edit?usp=sharing
The presentation can be found here: https://docs.google.com/presentation/d/1b5knuIpQXQ8TquMJu9izQCUF6H1Oq6hiuJRcVHyC_74/edit
Note that everyone can add comments, but you can not edit the document.