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Question la A producer of palm oil has three palm oil refineries located in Johor, Selangor and Negeri Sembilan. Each oil refinery produces three grades of palm oil, grades 1, 2 and 3. From a barrel of palm oil, the refinery in Johor can produce 20 gallons of Grade 1, 10 gallons of Grade 2 and 5 gallons of Grade 3. The refinery in Selangor will be able to produce four gallons of Grade 1, 14 gallons of Grade 2 and five gallons of Grade 3. Meanwhile, the refinery in Negeri Sembilan can produce four gallons of Grade 1,5 gallons of Grade 2, and 12 gallons of Grade 3. Demand for palm oil is 500 gallons of Grade 1, 850 gallons of Grade 2, and 1,000 gallons of Grade 3. How many barrels of palm oil need to be used by each refinery to meet the demand ? Question 1b A farmer is planning to cultivate chilli, corn and tobacco. He provides RM5,100 for ploughing expenses, RM6,025 for fertilizer and RM4,190 for other expenses. Below are the expenditures (RM) per acre for each type of crop: Chilli Corn Tobacco Ploughing 30 60 90 Fertilizer 40 50 200 Other expenses 60 40 20 Calculate the area planted with chilli, corn and tobacco, if he uses all the resources