Ron Alexander has just slept through the class in which Professor Larston explained the concept of amortization. Because the next test is scheduled for Wednesday, Alexander texts Nancy Wu to ask for her notes from the lecture. Wu texts back: "Amortization-sounds like Greek 2 me." Alexander next tries Sally Nadeau, who responds that she thinks amortization is what happens when an asset wears out. Barry Orwell is confident that amortization is the process of building up a cash fund to replace an asset at the end of its useful life. Explain the concept of amortization to Alexander. Evaluate the explanations of Nadeau and Orwell. Be specific.