Shirley, while reading on the internet, came across an article about Nike's latest shoe collaboration with Tiffany & Co - "Nike SB Dunk High PRM Diamond Supply Co. Tiffany Sneakers". Although Shirley already owns four pairs of Nike runners, she decided to buy the new runners due to her like for the brand Tiffany & Co and all the positive reviews on Google. Feeling pleased with herself, Shirley went to McDonalds for a treat. There was an in-store promotion, and the Sundaes were half price. Shirley bought two Sundaes rather than her usual one Sundae.

A. Identify the paragraph that represents "Change in quantity demanded" and "Change in demand". Graphically illustrate and explain the two concepts.

B. Reflect on an occasion where each of the two concepts applied to you.