Answer:
All but the last one is correct
Explanation:
Ustedes (ser) is not tienen but 'son' meaning 'You all are' (both formal and informal)
No, the solution is -3,-2,....,0,1,...
Answer:
AR Verb Ending Present Preterite
yo -o -é
tú -as -aste
él/ella/usted -a -ó
nosotros -amos -amos
ellos/ellas/ustedes -an -aron
