I have corrected some minor grammar and spelling mistakes. I have also changed the order of some sentences to make them easier to understand. Besides, I have added some interesting videos to make the explanation clearer. Finally, I have added some links to the references in the text.
Overall, great work!
This revision is now merged into master. If any of you wants to add further modifications to the content, make sure you do so by editing the master branch.
30 @MSGW2018/group1
I have corrected some minor grammar and spelling mistakes. I have also changed the order of some sentences to make them easier to understand. Besides, I have added some interesting videos to make the explanation clearer. Finally, I have added some links to the references in the text. Overall, great work!