Question 9 (1 point} v' Saved If the second derivative is zero where X = a and changes Sign from negative to positive, then there 0 1) is a local minimum where x= a O 2) must be an inflection point where X= a G) 3) may be an inflection point where x = a O 4) is a local maximum where x= a Question 13 (1 point) Saved A twice differentiable function, (x), has domain [-4, 4]. The table shown was used to sketch the graph of y = f(x). X -4 xx 0 and f"( x)