15. You have a rectangular piece of land that is 150 m . You would like to divide it into 3 equal rectangular plots with 2 fences parallel to the same pair of sides, as show below. The outside fencing cost $10 per meter and the inside fencing costs $12 per meter. What is the minimum cost of fencing required? (5 marks) Jour house. 150k6. Using the following function II(x, y) = 2x2 + 6y2 + 3xy -4. Find: (4 marks) a. n(5,3) = b . x=5 y=3 an C. - x=5 y=3