Answer
The following image shows the completed graphs of f when it is (a) even and when it is (b) odd:
Work Step by Step
(a) The graph is completed by graphing a reflection of f on the y-axis since even functions have the property:
$f(-x) = f(x)$
(b) The graph is completed by graphing a line symmetric to f with respect to the origin, since odd functions have the property:
$f(-x) = -f(x)$