A second reason emails may bounce is a bug in the system. Bugs are errors in the system that can

cause incorrect or unexpected results. They can often be identified by patterns in the results. That is$,$

the bug usually identifies all transactions with a certain attribute as having the same error, and other

transactions that don$$t have this attribute will not result in that error. Identify the bug in this data. $($Hint:

To find the bug, investigate any unusual patterns in the activity immediately preceding the Email

Sales Invoice to Customer activity, i$.$e$.,$ the Review and Approve Sales Invoice activity, for customers

who did not receive an email and did not have any dirty email data$).$