Answer:
See answers below
Explanation:
1. The effect of a large government's budget deficit on the economy's price level
<em>Macroeconomics.</em> Macroeconomics deals with the study of the aggregate economy and the impacts of fiscal and monetary policies on the economy. Given three levels of economics participants - the consumer, firms, and the government - macroeconomics focuses on the government. Thus, the effect of a large government's budget on the economy's price level will fall under the purview of Macroeconomics.
2. The effect of government regulation on a monopolist's production decisions
<em>Microeconomics</em>. While this tends toward macroeconomics as it considers the effect of government regulation, it aligns more with Microeconomics as the effect is being considered on a specific firm and not the whole economy.
3. A consumer's optimal choice when buying a flat-screen TV
<em>Microeconomics</em>. This focuses on the consumer as an economic participant, and is thus a micro-economic concern.