Suppose Jenny earns $60,000 per year working as a tax analyst. After ten years, she quits her job and pursues a PhD in Art History. For the 5 years she is in school, she gets a teaching stipend of $12,000 per year. For the next 35 years, she is an art director and earns $95,000. If she expects to live for 20 years in retirement. If Jenny doesn't earn any interest on her savings and wants to perfectly smooth consumption across her life, how much will she consume every year? What might prevent her from perfectly smoothing consumption