Answer:
Both. Depends on the situation.
Explanation:
"Ti" would be you as the object. Mainly after prepositions, "ti" is always used (por ti, para ti, a ti, etc.). "Te" is also for a direct/indirect object and is used when there's no preposition.
1)A
2)B
3)D
4)C
5)A
Hope it helps
Answer: Vosotros or Ustedes.
Explanation: This is formal for <em>you all</em> in Spain. If you are from Latin America ustedes is you all with no distinction between formal and informal.