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 Storage Location 1 2 3 1 10 17 15 1000 Unit Transportation Costs ($) Customers 2 15 14 3 12 20 10 11 1500 1400 Order size (units) 4 9 19 13 600 Stock (units) 1800 1400 1300 a- Formulate the above transportation problem as an ILP. b- Solve the ILP using Python (submit your Python code file on Moodle).