In Exercises 13–16, the graph of a function f is given. Use the graph to find each of the following:a. The numbers, if any, at which f has a relative maximum. What are these relative maxima?b. The numbers, if any, at which f has a relative minimum. What are these relative minima?

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f(x) = 2x³-15x² + 24x + 19 ✓ [-2, 6, 1] by [-15, 35, 5]