3. There is a guitar
4. There are some umbrellas
5. There is a surfboard
6. There are some octopus
7. There are some baseball caps
3. Is there a surfboard? Yes, there is.
4. Are there any trainers? No, there aren't
5. Are there any baseball caps? Yes, there are.
6. Is there a guitar? No, there isn't
7. Are there any umbrellas? No, there are't. Umbrella - зонт мне плохо видно и кажется их нет там
8. Are there any octopus? Yes, there are