For model formulations, clearly describe the mathematical program, as well as the inter- pretation of all decision variables and constraints.

? Submit the problem formulations/models as well as final solutions and required ex- planations in a pdf file.

? Separately submit an excel workbook containing your problem setup and solutions. Use an easily understandable layout and proper labels in your excel files, name each excel sheet by its problem-part number (e.g., Problem 2-b), and submit all sheets in asingle workbook.

A new police car costs the Bay City Police Department$26,000. The annual maintenance cost for a car depends on the age of the car at the beginning of the year. (All cars accumulate approximately the same mileage each year.) The maintenance costs increase as a car ages, as shown in the following table:

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