4. Suppose that output in a certain country is $4,000 billion, and that the country has a population of 100 million people. (LO2) a. What is per capita output in this country? b. Suppose that the country's output grows by 2.5 percent in a given year while the population grows by 1 percent. After these changes, what is the per capita output in this country? c. What was the growth rate (percentage change) in per capita output? ||