Summarize a descriptive analysis of the English pronominal system and some insights in relation to their teaching

Topics to discuss should be at least the following:
1. Examples from every group of pronouns you chose to discuss.
2. Functions of the groups of pronouns you chose to discuss.
3. How are these types of pronouns introduced in grammar books? Do you find the methods appropriate? Why/why not?
4. Which problems could come up in an EFL classroom (with native speakers of a language other than English)?