Number 1 1. A businessman needs 5 cabinets, 12 desks, and 18 shelves cleaned out. He has two part-time employees Sue and Janet. Sue can clean one cabinet, three desks and three shelves in one day, while Janetcan clean one cabinet, two desks and 6 shelves in one day. Sue is paid $25 a day, and Janet is paid $22 a day. In order to minimize the cost, how many days should Sue and Janet be employed?2. A factory manufactures two types of gadgets, regular and premium. Each gadget requires the use of two operations, assembly and finishing, and there are at most 12 hours available for each operation.A regular gadget requires 1 hour of assembly and 2 hours of finishing, while a premium gadget needs 2 hours of assembly and 1 hour of finishing. Due to other restrictions, the company can make at most7 gadgets a day. If a profit of $20 is realized for each regular gadget and $30 for a premium gadget, how many of each should be manufactured to maximize profit?3. In order to produce 1000 tons of non-oxidizing steel for engine valves, at least the following units of manganese, chromium and molybdenum, will be needed weekly: 10 units of manganese, 12 unitsof chromium, and 14 units of molybdenum (1. unit is 10 pounds). These metals are obtainable from dealers in nonferrous metals, who, to attract markets make them available in cases of three sizes, S,M and L. One S case costs $9 and contains 2 units of manganese, 2 units of chromium and 1 unit of molybdenum. One M case costs $12 and contains 2 units of manganese, 3 units of chromium, and 1unit of molybdenum. One L case costs $15 and contains 1 unit of manganese, 1 unit of chromium and 5 units of molybdenum. How many cases of each kind should be purchased weekly so that theneeded amounts of manganese, chromium and molybdenum are obtained at the smallest possible cost? What is the smallest possible cost ?Formulate and solve by linear programming.

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