Answer
The graph is shown below.
Work Step by Step
First list all the points of the function $f(x)$.
After that, list all the points of the function $g(x)$.
Add all output points $(Y-coordinates)$ of both functions.
All calculations are shown in the image file.
Draw all the resultant points of $f+g$.
The points are $A,B,C,D,E$
