The first one is correct because There're is shorter for There are and "There are a good answer to that question" doesn't sound correct right? Whereas the first one There's is short for There is so "There is a good answer to that question" Now that sounds grammatically correct right?
1. For years people have stopped using phones with dials.
2. To whom does this backpack belong?
3. They prepared a meal after they went shopping.
4. This is my favorite shop where I buy flowers.
5. By next year, the price of computers will start to decrease.
6. They were watching the film when he arrived in the middle of it.
Answer:
They are both the same because both the Panama and America's flag have the same three colors red, white, and blue, and they both have stars.
Explanation:
Hope this helps sorry the answer was short.