Can someone help me with this AP calc problem?

5. The figure at right is the graph of f* (x), the second derivative of a function f(x). The domain of the function f(x) is all real numbers, and the graph above shows f"(x) for -3.65x53.6. A. Find all values of x in the interval (-3.6,3.6) where f'(x) has a horizontal tangent. B. Find all values of x in the interval (-3.6,3.6) where f(x) is concave upward. Explain your answer. AP Calculus, Semester 2 Page 11 of 12 Full Name: User Name: Date: (print clearly) C. Suppose it is known that in the interval (-3.6,3.6), f(x) has critical points at x=1.37, and x=-.97 . Classify these points as relative maxima or minima of f(x). Explain your