K For the quadratic function f(x) = - 2x"+ 2x - 4, answer parts (a) through (c). Verify the results using a graphing utility. (a) Graph the quadratic function by determining whether its graph opens up or down and by finding its vertex, axis of symmetry, y-intercept, and x-intercepts, if any. The graph of f opens down. The vertex of f is (Type an ordered pair.) The axis of symmetry is (Type an equation. Simplify your answer.) Determine the y-intercept. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The y-intercept is (Type an integer or a decimal.) O B. There is no y-intercept. Determine the x-intercept(s). Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The x-intercept(s) is/are (Type an integer or a decimal rounded to two decimal places as needed. Use a comma to separate answers as needed.) O B. There is no x-intercept