IRWIN 11.10: A three phase very simple exercise.

This is the ugliest hack of a video that I have ever made. But my students have a final exam in two days time, so there is no room for beautifying this. I'll be removing this eyesore from YouTube right after the test, this coming Thursday. Until then, please bear with me. It is the solution, expanded, to the Irwin's textbook's chapter 11, problem 11.10. I have added the power questions to it.