Need help with both parts of this question

Find the open intervals where the function is concave upward or concave Select the correct choice below and, if necessary, fill in the answer box(es) downward. Find any inflection points. to complete your choice. O A. The function is concave upward on the interval(s) . The function is never concave downward. (Type your answer in interval notation. Use a comma to separate answers as needed.) 6 O B. The function is concave downward on the interval(s) . The function is never concave upward. (Type your answer in interval notation. Use a comma to separate answers as needed.) C. The function is concave upward on the interval(s) and concave downward on the interval(s). (Type your answers in interval notation. Use a comma to separate answers as needed.) D. The function is never concave upward or downward. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. The function has an inflection point at (Type an ordered pair. Use a comma to separate answers as needed.) O B. The function does not have an inflection point. attempts tempts