Focus on the benefits of the talent show and what students can gain by joining. These could include an opportunity to perform into others, if there is a prize to be won etc. It is best to focus on things that your fellow classmates could gain by joining the talent show, and hopefully they will decide to sign up. Also making the piece interesting and different will also help to attract interest.
They made a huge profit by doing things the proper way.
Third person omniscient narrators know absolutely everything about the story and all things related to it. Basically its the god of the story.
