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[CLO-3] Use the second derivative test to find the local maxima and minima of the given function. f ( x ) = x4 - 8 x2. 4 max at (-2, -20); min at (0, -4); max at (2, -20) O min at (0, -4); max at (2, -20) O max at (0, -4), min at (2, -20) min at (-2,-20); max at (0, -4); min at (2, -20)