[math]

a) Find the first and second derivatives.
[math]
[math]


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

A.     B.


C.     D.


c) Using the graphs of [math] and [math], indicate where [math] is concave up and concave down. Give your answer in the form of an interval.

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

[math] is concave up on

[math] is concave down on