1. Has Dana got a helmet?

No, she hasn't.

2. Has Ulan got a skateboard?  

Yes, he has.

3. Has Dana got a dog?  

Yes, she has.

4. Have Dana and Ulan a goldfish?

Yes, they have.

5. Have Dana and Ulan scarves?

Dana has got scarves, but Ulan hasn't got scarves.

2) Has Ulan got a skateboard? Yes, she has

3) Has Dana got a dog? Yes, she has

4) Have Dana and Ulian got a goldfish? No, they haven't.

Have Dana and Ulian got a scarves? Yes, they have