Did I answer this wrong? Please help. Thank you in advance

For the function f(x) = 2x4 - 2x3- 4x2 +7, find f''(x). Then find f"(0) and f"(3). f" (x) = 24x - 12x - 8 Select the correct choice below and fill in any answer boxes in your choice. O A. f'(0) = 7 (Simplify your answer.) O B. f"(0) is undefined. Select the correct choice below and fill in any answer boxes in your choice. O A. f'(3) = 79 (Simplify your answer.) O B. f"(3) is undefined