1. sí VI a John y a Paul. 2. sí compré un regalo. 3. sí, te llamé ayer por teléfono.
Verbs ending in -ir that undergo stem changes in the present tense also under go stem changes in the preterite. These verbs have a stem change in the second person formal singular (usted), third person singular (él, ella) and third and second person plural (ellos, ellas and ustedes) forms.
I think is the third one, because in the giving sentence it says: I don’t like doing sports, so I think the third one fit in for that.
