SOMEONE ANYONE I CANNOT FIGURE THIS OUT! PLEASE HELP ME! Match the following.

1 .
low income nations
an arrangement in which the government makes all the basic economic decisions
2 .
traditional economic system
developed countries with a per capita income of $10,000–$37,000
3 .
high income nations
less-developed countries with a per capita income of less than $2,500
4 .
middle income nations
an arrangement in which the government plays a limited role in basic economic decisions
5 .
population density
more-developed countries with a per capita income of $2,500–$10,000
6 .
mixed economic system
an arrangement in which the government sometimes makes decision and businesses may be both privately and government-owned
7 .
command economic system
a situation in which the number of people exceeds the available natural resources in an area
8 .
overpopulation
a nation's annual total income divided by its total population
9 .
underpopulation
the number of people who live in a square mile or kilometer
10 .
per capita income
an arrangement in which custom determines how goods are produced and distributed
11 .
market economic system
a situation in which the birth rate is not sufficient to replace the existing population