Watch the following videos:

 Video #1:  https://www.youtube.com/watch?v=Hg8zBJ1DhLQ 

Video #2:  https://www.youtube.com/watch?v=hDJdkcdG1iA. 

Video #3:  https://www.youtube.com/watch?v=jtCsoEw3Ykg 

Video #4:  https://www.youtube.com/watch?v=LFnewuBsYiY 

Video #5:  https://www.youtube.com/watch?v=-I23qGB6JdY 

What did you learn from Video #1?

What did you learn from Video #2?

What did you learn from Video #3?

What did you learn from Video #4?

What did you learn from Video #5?