Refer to the data. If year 1 is the first year of this nation's existence and year 6 is the present year, this nation's public debt is:

In the table above, the marginal product of the first unit of labor is ________ units of output

A) 4 B) 5 C) 16 D) 20

The figure above illustrates the problem of overcrowding and external costs experienced during the summer months in the state park. The competitive equilibrium is at

A) point G. B) point H. C) point I. D) point J.