Consider the function f(x, y) = x²y+y³ — 27y. f has f has a maximum a minimum f has a saddle f has some other critical point f has no critical point ✓at at (-3√3,0). ✓at (0, 3). ✓at (0,0). V at (0, -3). at (3√3,0). ✓at

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