A manufacturer estimates that its production can be modeled by f(x, y) = 100X0'75y0'25. Estimate the production level when x = 2600 and y = 2000. (Round your answer to the nearest whole number.) units function f(x, y) = x2 + 6y2 c-values c = 0, 2, 4, 5, 3 Describe the level curves of the function. The level curves are circles and a single point (degenerate circle). The level curves are ellipses and a single point (degenerate ellipse). Sketch a contour map of the surface using level curves for the given c-values