When the question uses 3rd person, either singular or plural, the subject and verb should remain the same. The word order for a question beginning with Est-ce que, is straight word order.
1. Est-ce qu'il y de la competition...?
Answer: (Oui or Non) Il y a de la competition entre...(name 2 companies)
(Remember that if you choose "non" there will be 2 negative words = Non, il n'y a pas de competition.....
Now, you try to answer all of them and I'll come back and check the answers for you.
Sra (aka Mme)