Find

1), 5real-life third-degree price discrimination practices from newspapers and research articles. You can also use specific producers' own website if you spot such practice and take a screenshot of the product page. Provide details about the type of service or good offered to consumers and range of consumer prices.

2),For each example, provide detailed information regarding how manufacturer/seller groups the consumers into different categories (e.g.: based on gender, age, occupation, income, etc.).

3.How is arbitrage prevented?