Older- oldest, elder- eldest 1) is three my youngest. 2) who of you two is 3) i like to spend weekends with . 4) this is in his collection.

1)Oldest older
2)Oldest
3)Older
4)Oldest
Не уверен насчёт 3

1) My oldest daughter is three years older than my youngest.
2) Who of you two is the oldest?
3) I like to spend weekends with my elder sister.
4) This is the oldest car in his collection.