Answer:
All but the last one is correct
Explanation:
Ustedes (ser) is not tienen but 'son' meaning 'You all are' (both formal and informal)
Answer:
Debo Ir a acostarme temprano.
No necesito preocuparme por mis notas.
Debo pensar en relajarme más.
Espero sentirme feliz.
Debo preocuparme menos por el dinero.
Explanation:
Second one. first doesn’t seem good
It is cante beacuse it past tense and cantar is in the future
