true? Given the graph of y = f(x) below, at which of the marked x-values can the following statements be x1 x2 x5 x3 x4 (For each question, enter your answer as a comma-separated list, e.g., x1,x3,x5. Enter none if no points satisfy the given condition) A. f(x) > 0 at x = B. f'(x) > 0 at x= == C. f(x) is increasing at = D. f'(x) is increasing at x = E. The slope of f(x) is negative at x = F. The slope of f'(x) is negative at x =