Rewrite the following using the correct POSSESSIVE form

Rewrite the following using the correct POSSESSIVE form:
1. the butterflies – the wings …………… the butterflies’ wings ……………………….
2. the students – the books ……………………………………………………………
3. drive – three hours ……………………………………………………………
4. the department store – the staff ……………………………………………………….
5. living – the cost ……………………………………………………………
6. some friends – my brother ……………………………………………………………
7. bread – the price ……………………………………………………………
8. the baby – the pram ……………………………………………………………
9. John and Paul – the wives ……………………………………………………………