Nadie.
Patricia is supposed to respond with the opposite of whatever Victoria says. Victoria said, “I’m going to speak with someone.” Therefore, Patricia should said “I’m not going to speak with anyone.”
Double negatives are allowed in Spanish, so the correct word which is the opposite of “alguien” is “nadie.”
11: Iban
12: Íbamos
13: Veían
14: Éramos
Hope this helped, good luck ⚡️