3. Barge transportation statistics. Visit the Web site of the American Waterways Operators (http://www.americanwaterways.

com/). Click on “Facts About the Industry” and answer the following questions:

a. How many barges are in operation in the U.S.?

b. What commodities are typically shipped by barge in the U.S.?

c. Compared to railroads and trucks, why are barges a more economical way to ship certain types of commodities?