a) Find .


b) Identify the graph that displays in blue and in red.

A.     B.


C.     D.


c) Using the graphs of and , indicate where is increasing and decreasing. Give your answer in the form of an interval.

NOTE: When using interval notation in WeBWorK, remember that:
        You use 'INF' for and '-INF' for .
        And use 'U' for the union symbol.
Enter DNE if an answer does not exist.

is increasing on

is decreasing on

You can earn partial credit on this problem.