It was mostly written by me, although I do admit to using ChatGPT to help out in generating some of my material. Most of the recent blog posts are Feynman style lecture notes I wrote for myself to learn new concepts and this piece I actually wrote well over 10 years ago and I figured to share it in case anyone else wanted a quick and visual overview. Apologies for missing out any important concepts. At the time I wrote down material that I found important so there are definitely things I may have not explained correctly.