1. rafael had an important letter
2. rafael got an important letter
3. rafael knew the information
4. rafael found out the information
I would say para. Because para means "to" and the sentence is saying "my brother bought a bike to ride in the mountains"
Answer:
El gusto es mio
Explanation:
mucho gusto = nice to meet you
El gusto is mio = my pleasure
Hope that helped :)