1. For each of the following examples, explain whether this is a case of external or internal economies of scale:

a. Most musical wind instruments in the United States are produced by more than a dozen factories in Elkhart, Indiana.

b. All Hondas sold in the United States are either imported or produced in Marysville, Ohio.

c. All airframes for Airbus, Europe's only producer of large aircraft, are assembled in Toulouse, France.

d. Hartford, Connecticut, is the insurance capital of the northeastern United States.