1. Visit  https://www.youtube.com/watch?v=xr3vXnFsueQ&t=2s watch  the video and take written notes, summarize your notes and write them in a word document.

2. Visit  https://www.youtube.com/watch?v=zJvc04-7jOE watch  the video and take written notes, summarize your notes, and write them in a word document.

3. Solve the problem in the attached exercise file, and show all the steps leading to the answer.