5. Why would you want to protect a workbook with a password, digital signature or signature line? 6. List and describe the 3 options available when Checking for Issues a. b. C. 7. When sharing a workbook, why would you want to be able to track changes made to the workbook? 8. Why is it important that you can save Excel workbooks in different file formats? 9. Using the Modifying Existing Data video, describe how you can modify existing data in a worksheet. 10. What is one way you can use what you've learned in this module