Excel unprotect workbook and make a change to range name

I have an Excel workbook that is protected. The workbook password is AA12. I have a name range called EntityNumber. I need to change the EntityNumber. Is there Excel code that will

1 Allow me to select a workbook from a folder
2 Unprotect the workbook
3 Let me change the EntityNumber
4 Protect the workbook
5 let me save and close the file

Let me know if you need more information. Thank you.