Submit a 4- to 5-page paper that addresses the following questions. Be sure to use references within the paper to support your answers. Show work for all calculations.

(a) If real GDP was $13.1 trillion in 2013 and $13.3 in 2014, what is the growth rate? (b) How many years would it take for GDP (gross domestic product) to double (using your answer from part a)?
What are the sources of human capital? What are sources of labor productivity? Discuss some specific examples.
What is the law of diminishing returns? Give an example of what the law of diminishing returns implies.
What happens when the government raises taxes and uses revenue to engage in spending?