Which of the following functions f has a removable discontinuity at a? If the discontinuity is removable, find a function g that agrees with f for x a and is continuous at a (If an answer does not exist, enter DNE (a) fx)- x4 1 a 1 The discontinuity is removable. O The discontinuity is not removable x3 x 30x fx The discontinuity is removable. O The discontinuity is not removable g(x) 6 (c) fx Sin x, a Recall that h (x) means the largest integer that is less than or equal to h(x).) O The discontinuity is removable The discontinuity is not removable. O