Consider the following function. f ( X ) = X - 2 x2 - 4 (a) Explain why f has a removable discontinuity at x = 2. (Select all that apply.) lim f(x) is finite. x - 2 ( lim f(x) does not exists. Of(2) and lim f(x) are finite, but are not equal. x - 2 O f(2) is undefined. O none of the above (b) Redefine f(2) so that f is continuous at x = 2 (and thus the discontinuity is "removed"). f ( 2 )