Part 1.
Number 1. Nosotros.
Number 2. Ellas.
Number 3. Ella.
Number 4. Tu.
You are using "SER" which is the to be. I have to go but I wish I can help with the second. Bye!
"Habla" is the right word
Answer:
nuestro abuelo
Explanation: The question was who is your fathers father n in english thts ur grandfather so yea
