Hi, please list out the formulas where necessary , graphs where necessary , if the question doesnt require it, its fine not have it but please do put it down if it helps you to explain . If the answer is provided, its because I struggled to understand the answer, please dont just reproduce it, but rather explain it and list out the formulas used with explanations OF FORMULAS USED IN THE QUESTION , the procedure etc.Thank you!

Imagine drawing a graph where the horizontal axis had a person's age, and the vertical axis was a measure of the real value of their income or consumption. Draw a rough sketch of what you expect the "income" line to look like, as well as what you expect the "consumption" line to look like. Give an intuitive explanation.