Almost everything is right . It's not Camino .
Mi amigo tiene que caminar los perros.
No hay nada encima de la mesa. If you sound it out, it could either be "nada" or "nadie" but if you are talking about an object, then use "nada". If you are talking about someone not on the table, you would use "nadie" Nada: for object, Nadie: for person.
Hope this helped
Answer:
la profesora ayuda a los alumnos
Explanation:
