Explain as completely as you can what an economist means by demand. - What is meant by a change in demand and change in quantity demanded ? - EXPLAIN THE CONCEPT In your own words and be sure to explain them fully. Identify ALL the factors that can shift a demand curve (those in the text and in the presentations). Explain briefly how each factor impacts the respective curve you have chosen (could be several paragraphs) - Explain what happens to Pe and Qe when demand (supply) increases and when demand (supply) falls.

I need fully explanation and examples.