The given graph of the ** *** derivative * f' of a function f is shown. Answer the following questions ** *** only on the interval *(-6,6) .

** 1. ** On what intervals is f increasing?

Answer (in interval notation):

** Note: ** * You can click on the graph to enlarge the image.*

Answer (in interval notation):

** 2. ** On what intervals is

Answer (in interval notation):

** 3. ** At what values of

Answer (separate by commas):

** 4. ** At what values of

Answer (separate by commas):

You can earn partial credit on this problem.