2. Write a script that creates and calls a stored procedure named invoice_balance. This stored procedure should use two variables to store (1) the count of all of the invoices in the Invoices table that have a balance due and (2) the sum of the balances due for all of those invoices. If that total balance due is greater than or equal to $30,000, the stored procedure should display a result set that displays the values of both variables. Otherwise, the procedure should display a result set that displays a message like this: Total balance due is less than $30,000.