OUTSIDE , 20 years old if im talking about the same one as you.
A mi amigo le gusta.... because le is the él, ella, usted form of me gusta which is the yo form
2. Las hermanas de Juan son graciosas.
3. Las bicicletas de Luis y Carlos son modernas.
4. El hermano de Ana es tímido.
c .es would be my answer , but b also applies if you are talking to him directly and saying it as a compliment , c would be if you are just talking about him to someone else
