The graph of f(x) is shown. The graph starts at the bottom left, continues up through the x axis at negative three to a maximum around y equals three, goes back down through the x axis at negative one to a minimum around y equals negative one, and goes back up through the x axis at one. For what values of x does f(x) = 0? −1, 1, 2 −2, −1, 1 −3, −1, 1 −1, 1, 3