Answer the following questions. Make sure you use comments in your SQL file to clarify/show which SQL statement is the answer to which question. The questions are:

1. Write a query to show customers and their possible payments. (show all customers and their payments if they have any.)
2. Write a query to show customers and their possible orders. (show all customers and their orders if they have any.).
3. Write a query to show products and their possible orders. (show all products and their orders if they have any.)
4. Write a query to show employees and customers.
5. Write a query to show countries that customers and employees are from (no duplicates).