Do you know Joanne Rowling? She's the author of the Harry Potter stories. Harry was a boy wizard. He studied in a school of magic for wizards. Was he a good wizard? Of course he was! And he was a good friend, too.

Background Information:

• The provided text introduces Joanne Rowling as the author of the Harry Potter stories.
• It describes Harry Potter as a boy wizard who attended a school of magic.
• The text affirms that Harry was a good wizard and a good friend.

Task:

The main task is to correct the following sentences, likely based on the information provided or general knowledge about the Harry Potter series.