Answer :
Final answer:
Microeconomics and macroeconomics are both relevant to the topics mentioned.
Explanation:
The topics mentioned would likely be studied in microeconomics and macroeconomics depending on the specific focus of the analysis.
- A consumer's optimal choice when buying a flat-screen TV: This would be studied in microeconomics as it involves individual consumer behavior and decision-making.
- The government's decision on how much to spend on public projects: This would be studied in macroeconomics as it involves analyzing the overall economy, government policies, and the impact of public spending on aggregate demand.
- The effect of an increase in consumer income on demand for smart phones: This would also be studied in microeconomics as it focuses on the relationship between consumer income and demand for a specific product.
Learn more about Microeconomics here:
https://brainly.com/question/36728044
#SPJ4