once in a while, brian gets a surge of energy and rushes from one activity to another. he doesn't seem to need much sleep and notices that his mind is full of ideas that he needs to tell anybody who will listen (or forced to listen). he can stay awake for days and e quite creative on a project. but, other times, brian tends to sometimes struggle with feelings of sadness, low energy, and thoughts of ending his life. the most accurate diagnosis would be: