Question 15 1 Solve the previous formulated model (Copperfield Mining Company problem) by using graphical analysis. The optimal solution to the model is O (0,4) O (6,0) O (1,3) O (3, 1) https://csustan.instructure.com/courses/14972/quizzes/80870/take/questions/879617 Activity: Au Copperfield Mining Company owns two mines, each of which produces three grades of ore -- high, medium, and low. The company has a contract to supply a smelting company with at least 12 tons of high-grade ore, 8 tons of medium-grade ore, and 24 tons of low-grade ore. Each mine produces a certain amount of each type of ore during each hour that it operates. Mine 1 produces 6 tons of high-grade ore, 2 tons of medium-grade ore, and 4 tons of low-grade ore per hour. Mine 2 produces 2.2, and 12 tons, respectively, of high, medium, and low-grade ore per hour. It costs Copperfield $200 per hour to mine each ton of ore from mine 1, and it costs $160 per hour to mine each ton of ore from mine 2. The company wants to determine the number of hours it needs to operate each mine so that its contractual obligations can be met at the lowest cost. Formulate a linear programming model for this problem. Define xi as the number of operation hours for mine 1. x2 as the number of operation hours for mine 2. and Z as the total cost. Which of the following model formulations is correct? O Maximize Z-200x1+160x2 subject to 6x1+2x2=8 4x1+12x2524 x1, x2>=0 O Minimize Z=200x1+160x2 subject to 6x1+2x2-12 2x1+2x28 4x1+12x2>=24 x1,x2>-0