Complete the family tree that appears in the image on the left from the following indications:
- Miguel and Alejandro are called "dad" and "son" among them.
- Fernando has an older brother than him.
- Alejandro is Carmen's brother.
- Alberto is Marcos's maternal grandfather.
- María has only 2 children, as does Carmen and Alberto.
- Tomás is Lucia's brother-in-law.
- Berta is her sister's little sister but is older than her brother.
- Patricia is Carmen's niece.
Below is the completed family tree based on the indications: