Question 6(10 points): xyz company produces metal shelves that are made of metal bars. There are three different sizes of metal bars that XYZ purchases from some suppliers |small-size bars, medium-size bars, large-size bar, extremely-large-size bar). In fact, XYZ buyz "batches" of metal bars from 15 different suppliers. Tabie 1 provides information on the cost of a batch bought from cifferent suppliers. This table also provides information on the number of bars with different sizes that a batch from each supplier indudes. As an example, as Table 1 shows, one batch from Supplier 1 costs $4400 and includes 16 extremely large bars, 28 large bars, 45 medium bars, and 37 small bars. Similar information is available for other suppliers in Table 1 XYZ must buy at least 600 extremely large, 540 large, 650 medium, and 790 small bars each week. Because of some operational reasons, XYZ can buy at moat 1000 bars per week from each supplier. Part b) How would you modify the model to ensure that at least 60 percent of purchased small bars are purchased from Suppliers 4 and 5 . (3 points) Question 6(10 points): xyz company produces metal shelves that are made of metal bars. There are three different sizes of metal bars that XYZ purchases from some suppliers |small-size bars, medium-size bars, large-size bar, extremely-large-size bar). In fact, XYZ buyz "batches" of metal bars from 15 different suppliers. Tabie 1 provides information on the cost of a batch bought from cifferent suppliers. This table also provides information on the number of bars with different sizes that a batch from each supplier indudes. As an example, as Table 1 shows, one batch from Supplier 1 costs $4400 and includes 16 extremely large bars, 28 large bars, 45 medium bars, and 37 small bars. Similar information is available for other suppliers in Table 1 XYZ must buy at least 600 extremely large, 540 large, 650 medium, and 790 small bars each week. Because of some operational reasons, XYZ can buy at moat 1000 bars per week from each supplier. Part b) How would you modify the model to ensure that at least 60 percent of purchased small bars are purchased from Suppliers 4 and 5 . (3 points)