$($Refer to code example $6-2.)$ What does the ORDER BY clause in the OVER clause for the second SUM function do$?$ Group of answer choices It sorts all rows in the result set by the invoice$\_$total column. It sorts all rows in the result set by the invoice$\_$total column and causes the values in the invoice$\_$total column to be accumulated from one row to the next. It sorts the rows for each vendor by the invoice$\_$total column and causes the values in the vendor$\_$id column for each vendor to be accumulated from one row to the next. It sorts the rows for each vendor by the invoice$\_$total column and causes the values in the vendor$\_$total column for each vendor to be accumulated from one row to the next.