A company selling refrigerators has stocks at three different storage locations. Four customers have made orders for purchasing refrigerators from the supplying company. The following table provides the following information: Stock size at each storage location Order size for each customer Unit transportation costs from storage locations to customers Unit Transportation Costs ($) Customers Storage Location 1 2 3 4 Stock (units) 1 10 15 12 9 1800 23 2 17 14 20 19 1400 3 15 10 11 13 1300 1000 1500 1400 600 Order size (units) a- Formulate the above transportation problem as an ILP. b- Solve the ILP using Python (submit your Python code file on Moodle).