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4. Consider the function f(x) whose graph is shown below. (0. 5) (6, 5) (-1,4) (6. 3) 10. 3) 2- (-2,2) 1 + (2.0.5) 7 a. Enumerate all discontinuities of f(x) and identify their types. (Hint: There are actually 6 of them). b. If a discontinuity is removable, state the redefinition that will remove it