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9126 Example 12.1. A manufacturer produces two types of models M, and My. Each M, model requires 4 hours of grinding and 2 hours of polishing; whereas each M, model requires 2 hours of grinding and 5 hours of polishing. The manufacturer has e grinders and 3 polishers. Each grinder works for 40 hours a week and each polisher works for 60 hours a week. Profit on an M, model is Rs. 3 and on an M, model is Rs. 4. Whatever is produced in a week is sold in the riarket. How should the manufacturer allocate his production capacity to the two types of models so that he may make the maximum profit in a week