Analyzing the surplusS: The following graph approximates the federal surplus S of the Unit...

Analyzing the surplusS: The following graph approximates the federal surplus S of the United States. Use the graph to estimate the following. Write answers in interval notation and estimate all surplus values to the nearest $10 billion.

a. the domain and range

b. interval(s) where S(t) is increasing, decreasing, or constant

c. the location of any global maximum and minimum values

d. the one-year period with the greatest rate of increase, and the one-year period with the greatest rate of decrease

Source: 2009 Statistical Abstract of the United States, Table 451