Написати у коректній формі: Ann's

Написати у коректній формі: Ann's (older/elder) sister lived in Great Britain last year. Whose grandmother is (older/elder) — yours or Ivan's? Victoriais the (oldest/eldest) student in our class. Is Peter your (older/elder) or your younger brother? My uncle is the (oldest/eldest) member of the family. My cousin is two years (older/elder) than me. The building of our school is (older/elder) than all the others buildings in our town. Do you know that their (older/elder) son is a singer?