X - 49 if x 0 X - 7 . . . a) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. lim f(x) = - 14 (Simplify your answer.) X- - 7 O B. The limit does not exist. b) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. lim f(x) = (Simplify your answer.) X-+ 0 O B. The limit does not exist.c) Select the correct choice below and, if necessary, ll in the answer box to complete your choice. 0 A- lim f(x) = D (Simplify your answer.) x>7 O B. The limit does not exist