Identify the diagnosis that BEST matches each case description, based on the available information. You do NOT need to identify specifiers, just the main diagnosis. Riley was just brought to the hospital by their partner due to a behavior change over the past 5 days. Riley has been sleeping only 3 hours per night, but they do not feel tired. They are working on a new project for work, and they have been talking constantly about how their project will solve world hunger. Their partner decided to bring them to the hospital when she discovered that they had spent half of their savings on materials for this project, despite struggling to pay rent