What is the specificity of the following selectors:

For more information, see SpeciFISHity, the specificity cheat sheet featuring plankton, fish, and sharks.

1. --p
2. --.important
3. --#unique
4. --a:hover
5. --li.list-item
6. --div#mainNav
7. --div[id="mainNav"]
8. --li:nth-of-type(2n+3)
9. --body > header
10. --li:nth-of-type(5) + li
11. --header:not(#main)
12. --.invalid.invalid.invalid
13. --#thirdParty#thirdParty#thirdParty
14. --#why #would #this b .necessary
15. --li:where(:nth-of-type(2n+3))
16. --li:is(:nth-of-type(2n+3))