Identify the graphs A (blue), B(red) and C (green) as the graphs
of a function and its derivatives and
.
(Clicking on the sketch will give you a version of the picture in a
separate window.)

is the graph of the function, .
is the graph of the function's first derivative,
.
is the graph of the function's second derivative,
.

Hint:
Remember that is itself a function,
and we can find the derivative of the function ,
which is called the second derivative of the function
and denoted by .