The function f is continuous for all real numbers and has first derivative function given below. F'(x) = 64-4x² (4-x²)2/3 (a) There are four critical points of f. Find all four. Enter your answers from smallest to largest. (smallest critical pt -- cp1) X = X = X = (largest critical pt -- cp4) (b) Find the signs of f' on each subinterval for the critical points you found in part (a). cp1---Select--- ✓ cp2 --Select--- (c) Use the signs in part (b) to classify each critical point as a local maximum, local minimum, or ne cp1 --Select--- ✓ cp2 -Select--- ✓ X = --Select-- cp3-Select--- CD4 I Select V. cp3--Select-- cp4 --Select-

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