please help with questions. thank you. this is a css question.

1. List and define all the layers of styles presented.

2. Which styles are superseded by the web page Author? Which styles does the web page Author use to supersede those styles? Explain each of these styles and how they are included in the Web pages. List the order of precedence of these styles

3. List each style the web page author can use and provide a code example of each type of style.