#1. Write a SELECT statement that returns two columns from the Invoices table: VendotlD, and PaymentSum, where PaymentSum is the sum of the PaymentTotal column. Group the result set by VendorID #2. Write a SELECT statement that answers the following question: What is the total amount invoiced for each AccountNo? Use the with ROLLUP operator to include a row that gives the grand total. Hint: Use the lnvoicedLineltemAmount column of the lnvsicedineltems table. #3. Write a SELECT statement that returns the same result set as this SELECT statement. Substitute a subquery in a WHERE clause for the inner join. SELECT DISTINCT VendorName FROM Vendors JOIN Invoices ON ORDER BY VendoName #1 Write a SELECT statement that returns a single value that represents the sum of the largest unpaid invoices submitted by each vendor. Use a derived table that returns MAX(InvoiceTotal) grouped by VendoriD, filtering for invoices with a balanced due. #5. Rewrite-44 s it uses a common table expression (CTE) instead of a derived table