Need help with these questions I'm having trouble

3. Microeconomics is concerned with: a. some specific segment of the economic system. b. the entire economic system. c. reducing national unemployment and inflation rates. d. what causes changes in the overall level of economic activity. 4. Which of the following is a normative economic statement? a. The unemployment rate for the United States is currently 5.4%. b. The inflation rate in the United States is too high. c. An increase in the price of a good will reduce the amount purchased. d. Higher profits in an industry will attract more entrepreneurs into the industry. 5. A model (or theory): a. is a general statement about the causal relationship between variables based on facts. b. helps explain and predict the relationship between variables. c. when expressed as a downward (negatively) sloping graph implies an inverse relationship between the variables. d. all of the above. 6. Which of the following statements is true