- The constraints and objective function in linear form

- Define the meaning of each variable

- Explain purpose of the constraints

Q3: Suppose there are monthly fixed costs for operating the distribution center and the warehouses. If DEF does not use a facility in a given month, it avoids paying the monthly fixed cost for that facility for that month. _ Distribution center 3 m -m- -M- a} Formulate an optimization model that will minimize the total cost for DEF for the month of January. b] Formulate an optimization model that will minimize the total cost for DEF for January through March. Note that if a warehouse has widgets in storage from one month to the next one, then that warehouse was in use in both months