Which of the following statements is true?
1. In load step of the ETL process, data is loaded into the ERP system from the data warehouse.
2. All of these statements are true.
3. Unstructured data is tagged with metadata in the extract step of the ETL process.
4. During the testing step of the ETL process, the data in normalized.
5. Both the database and the ERP software runs on an operating system like Oracle, SAP or NetSuite.