Answer:
1. El hijo de mis tíos es mi primo.
2. Los hermanos de mi padre son mis tíos.
3. Los padres de mi madre son mis abuelos.
4. Mi hermano y yo somos los nietos de nuestros abuelos.
5. Yo soy sobrino de mi tío.
Explanation:
Identifying the narrator, gender, number and time indicated by a sentence is the first step that must be taken. This is very important to be able to logically conjugate the verbs, and that these have concordance with what is being expressed. in this case the narrator is in my first person and the spaces must be completed taking into account the degree of familiarity they describe of the members at each point