Consider the function . For this function there are three important intervals: , , and where and are the critical values.
Find
and
For each of the following intervals, tell whether is increasing (type in INC) or decreasing (type in DEC).
:
:

has an inflection point at
where is
Finally for each of the following intervals, tell whether is concave up (type in CU) or concave down (type in CD).
:

You can earn partial credit on this problem.