2. Consider the pårametric curve x = (t? – 2t + 1)e3t, y = (t² + 4t + 4)e3t a. Find points (x, y) on the parametric curve where the tangent lines are vertical. b. Find points (x, y) on the parametric curve where the tangent lines are horizontal. c. Find the interval(s), in terms of t, where the parametric curve is concave upward. d. Find the interval(s), in terms of t, where the parametric curve is concave downward.

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