Thanks for posting those, they are just lovely! Still a little confused about your type. It looks different to me in that first pic, as compared w/the others(?). I had a similar problem when I tried asking people about my hair type (so I combined ppl's answers and assumed "3b/c" lol).
Maybe your hair is 4a/b, or 4b like you suspect? Maybe these pics will help more people assess your type. Whatever it is, it is "type beautiful"