Question: Question: Another tutor said that the answer for (a) On what intervals is f increasing? (Enter your answer using interval notation.) was (1,4)U (5, infinity
Question: Another tutor said that the answer for (a) On what intervals isfincreasing? (Enter your answer using interval notation.) was (1,4)U (5, infinity ) but the answer is incorrect. So, could you, please, focus more on the answer for (a)? I would really appreciate it. Thanks in advance.

8. [l1.5 Points] SCALCET9 4.3.006. The graph of the derivative f' of a function fis shown. y y=f'(X) (a) On what intervals is fincreasing? (Enter your answer using interval notation.) On what intervals is fdecreasing? (Enter your answer using interval notation.) (b) At what values ofx does fhave a local maximum or local minimum? (Enter your answers as a commaseparated list.)
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