Answer:
Van
Explanation:
Van refers to both the Aunt and Uncle as "they", they go to the mountains. All the other forms of ir refer to either I, he/she, you, we, etc.
Answer:¿Abuela, me puede traer ese libro, por favor?
¿Abuela, me puede decir que horá ès, por favor?
Explanation: The 'usted' isn't used because the formality is adjusted to the question or statement.
