Answer: Va
Explanation: There are multiple conjugations for the verb "ir" each corresponding to the subject of the sentence/ the one who carries out the action. In this sentence, Katiana should be in the el/ella/usted form. The el/ella/usted form of "ir" is va.
Los Chicos salieron ..........
I can’t see the picture .........
Correct Translation: <span> It's important for you to sleep before the trip.
</span>
The sentence above is incorrect because this isn't the present subjunctive form of the verb 'dormir.' Remember that some verbs are stem changing verbs and ir <span><span>→ </span>ue. The correct verb form is duermas.
</span>
'dUErmas' → [verb 'dormir' - present subjunctive - 2nd person singular ('tú' = informal 'you')