9. Find the absolute extrema of the function {(x, y) = x3 3x2 + 6x + y3 - 3y2 over the region bounded by x = 3. y = 3. the x-axis and y-axis. 10. A manufacturing company produces two models of a television set. x units of Model A and y units of Model B per week. at a cost of C (x, y) = 6x2 + 12312. If it is necessary (because of shipping considerations) that x + y = 90. how many of each type of set should be manufactured per week to minimize cost? What is the minimum cost