Find the points on the curve where the tangent is horizontal or vertical. If you have a graphing device, graph the curve to check your work. (Enter your answers as a comma-separated list. x=9-2²², y = t³ - 12t horizontal tangent (smaller y-value) horizontal tangent (larger y-value) vertical tangent (x, y) = (x, y) = (x, y) =

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