I don't have the sentences you want but I can tell you a few things about how to write a sentence:
1:Make sure to express a complete thought
2:use correct punctuation
3:include both a subject and a verb
If you can do this than your sentence structure will be terrific
I don't know for sure but I think the second one is an intensive pronoun
Answer:
Charles is Laurie's alter ego.
Its the fourth one someone's is correct