Find the largest open intervals on which the function is concave upward or concave downward, and find the location of any points of inection. v ESeiec't the correct choice below and ll in the answer box(es) to complete your choice. (Type your answer In interval notation. Use a comma to separate answers as needed. Use integers or fractions for any '3: numbers In the expression.) y... .,. we . were; 0 The function IS concave upward on The function never has an interval that is cancave upward/downward. 10" __;_ Q The function Is concave downward on 1.2;; . The function never has an interval that is concave upwardldownward. exam Q c- The function is concave upward on it, _ , and concave downward on