Which of the following would be considered intellectual property?

Lisa Simpson writes a thesis that explains why mediocre cartoons can sometimes captivate nationwide audiences as her response to an essay question posed by her teacher at school. A month later, she picks up the Springfield Post-Gazette to find that her essay has been published as a front page article. Does Lisa have a cause of action against the Post-Gazette?

Homer Simpson invents a hammer that hammers nails into a wall with the press of one button and without any further human intervention. As Homer is preparing his patent application, Flanders invents the same device independently. Flanders then begins marketing the device. Can Homer sue to enjoin Flanders from marketing the hammer?

Mikey, a new sneaker manufacturer, uses, as its logo, a "swoosh" that looks similar to the one used by its competitor, Nike, for the past several decades. However, Mikey's "swoosh" is slightly narrower and is blue instead of white. Nike sues and asks a court to enjoin Mikey from using this logo. Will Nike be successful?