To save your audio in audacity format aup3
Go to file, save project
Then save project
Save to computer
Find your testwork folder
Rename your file exactly the same as your exam paper including spelling and capitalization
Then press save
To export your audio in mp3 format
Go to file
Export audio
Export to computer
Using browse,
Find your testwork folder
Rename your file exactly the same as your exam paper including spelling and capitalization
Change the format to mp3
Then press save
Then export