a) At what interval(s) is the function increasing? (Enter your
answer using interval notation. If an answer does not exist, enter
DNE.)
b) At what interval(s) is the function decreasing? (Enter your
answer using interval notation. If an answer does not exist, enter
DNE.)
c) At what interval(s) is the function concave up? (Enter your
answer using interval notation. If an answer does not exist, enter
DNE.)
d)At what interval(s) is the function concave down? (Enter your
answer using interval notation. If an answer does not exist, enter
DNE.)





