1. Yo sabré.
2. Tu tendrás
3. Nosotros vamos a querer/ nosotros querremos
5. Ustedes irán
6. Tu serás
7. Yo estudiaré
I think it is because in America, (a very popular country) We have many people that study Espanol so that is why many schools have kids take Spanish class, because of how many people are fluent in it.
A. Voy a
The question asked “ What are you going to do at the beach?” and grammatical A will be translating into “ Going to play volleyball”