Define the appropriate target population and the sampling frame in each of the following situations:
a. The manufacturer of a new cereal brand wants to conduct in-home product usage tests in Chicago, a
b. A national chain store wants to determine the shopping behavior of customers who have its store charge card.
c. A local TV station wants to determine households' viewing habits and programming preferences.
d. The local chapter of the American Marketing Association wants to test the effectiveness of its new member drive in Atlanta.