The answer to your question is b podia
Answer=1) El mesero
This is because this is a masculine singular and waiters usually wear a uniform
A.- Artistic
Music is a form of art/ is artistic because it has the same impacts as paintings. It reflects on us emotionally and influences us.
1.tengo
2.sere
3.hablará
4.fueras o serás (not to sure for this one)
5. Puedo
6. Estudiábamos
7. Trabajas
8. Supiera
9. Tuviéramos
10. Fuera