помогите пожалуйста с английским срочно нужно заранее спасибо

a)2. Whose camera is this? It's Bob's. It's his camera. It's his. 3. Whose watch is this? It's Tony's. It's his watch. It's his. 4. Whose skateboard is this? It's Bill's. It's his skateboard. It's his. 5. Whose football is this? It's Paul and Ann's. It's their football. It's theirs. 6. Whose alarm clock is this? It's Pat's. It's her alarm clock. It's hers.
b) 1)) mine. 2) her. 3) theirs. 4) your. 5) hers. 6) our.