Did I do number 2 correctly?

E. None of 2. If f "(x) > 0 on (0, 5) U (7, co), which of the following statements is correct? A. f(x) is concave up on (0, 5) U (7, co). O B. f(x) is concave down on (0, 5) U (7, 0o). O C. f(x) is decreasing on (0, 5) U (7, co). O D. f(x) is increasing on (0, 5) U (7, co). O E. None of the above are correct. 3. If f(x) = e8x2+1, find f "(x)