a. Go to the Relationships screen and connect the five tables, enforcing referential integrity. b. Calculate the total sales for each customer. Include CustomerID and CompanyName from the Customer table and the calculated sale amount from the Sale_Amount Calculation query. Name the query Total_Customer_Sales. c. Generate an e-mail user name for each employee using the first letter of the employee's first name and the first five letters of the employee's last name, e.g., Rod Smith => rsmith. Include EmployeeID, Employee FirstName, and EmployeeLastName in the query. Name the query Employee_Email_Generator. d. Calculate the total sales for each month. e. Determine which customer had the highest average sales amount. (Hint: Sort in descending order.) f. Assume the employees earn a 5 percent commission on sales. Calculate the total commission due to each employee. Use two queries to do these calculations. Required: e. Which customer had the highest average sales amount? What specifically was their average amount? f. Which employee had the highest earned commission? What specifically was their commission amount?