Using the AdventureWorks $2019$ database, create SQL queries that answer the following questions $(100$ points, $10$ points each$)$:

$1.$ How many customers AdventureWorks has?

$2.$ Retrieve the top $5$ products with the highest list prices from the "Production.Product" table.

$3.$ Retrieve the top $5$ most expensive products from the Product table.

$4.$ Retrieve the order number, order date, and total due amount for orders placed by the customer with CustomerID $30052.$

$5.$ Calculate the total revenue for each product.

$6.$ Retrieve the top $3$ best$-$selling products along with the total quantity sold for each product.

$7.$ Retrieve the number of orders placed in each year.

$8.$ Calculate the total sales amount for each year.

$9.$ Calculate the total revenue for each sales territory.

$10.$ Calculate the average sales amount per order for each month in the year $2014.$