uiz Two 1. Perform the indicated operation: - 2. Find matrix product: 3. Find the inverse: 4. Graph the feasible region for the system of inequalities: 3x - 2y 6 x + y -5 y -6 5. Use graphical methods to solve the linear programming problem: Max z = 10x +8y Subject to: 2x + 3y 100 5x + 4y 200 x 10 0 y 20 6. Transportation A manufacturer of refrigerators must ship at least 100 refrigerators to its two West Coast warehouses. Each warehouse holds a maximum of 100 refrigerators. Warehouse A holds 25 refrigerators already, and warehouse B has 20 on hand. It costs $12 to ship a refrigerator to warehouse A and $10 to ship one to warehouse B. Union rules require that at least 300 workers be hired. Shipping a refrigerator to warehouse A requires 4 workers, while shipping a refrigerator to warehouse B requires 2 workers. How many refrigerators should be shipped to each warehouse to minimize costs? What is the minimum cost