Get filename (and open) the latest modified file in a folder(AppleScr)

I’m stuck in a simple part of my script.

My script downloads an Excel file into the download folder.
There are multiple files there, but my script has to open the latest file in the list (that’s my Excel file).

I’ve tried so many things but none was succesfull.

Can anyone please help?


ps. I use AppleScript
ps2. The filename is generated, so I can’t open it like that