An ad campaign for a new snack chip will be conducted in a limited geographical area and can use TV time, radio time, and Internet ads. Information about each medium is shown below.

The number of Internet ads should be at least one third of all ads. Also, the advertising budget is $18,000. We would like to develop a model that will minimize the number of people reached while ensuring a minimum exposure quality of 300. Define the decision variables as follows:

Let T = the number of TV ads Let R = the number of radio ads Let I = the number of Internet ads

1. What is the objective function?

2. Which constraint represents the constraint for the minimum exposure quality?

3. Which of the following represents the constraint for the number of Internet ads?

Medium Cost Per Ad # People Reached Exposure Quality TV 1,000 20,000 Radio 600 10,000 45 Internet 300 60,000