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 the total money paid by each customer 2. Write a query to show the total money paid by each customer per year 3. Write a query to show the total number of orders from each customer 4. Write a query to show the total value of each order. 5. Write a query to show the number of employees in each office 6. Write a query to show the number of customers who have not placed any orders. 7. Write a query to show the number of products that have not been ordered by any customer. 8. Write a query to show the number of customers from the USA that paid more than 50000 9. Write a query to show the offices that have more than four employees. 10. Write a query to show the orders that their value is more than 50000 (order value quantityOrdered priceEach)