The graph of function $f(x)$ is shown below. If you would like to enlarge the graph or make numbers and letters easier to read, you may click on it to open it in a new window. You may then enlarge that window with your mouse. To further enlarge the image, use your browser’s zoom capabilities. On a PC this is usually ctrl shift + (and zooming out is ctrl -). On an Apple computer this is usually apple shift + (and zooming out is apple -). Based on the given graph of $f(x)$, fill in the blanks. The function’s domain, in interval notation, is . The function’s range, in interval notation, is . Use the upper case letter U to represent the “union” symbol, if needed.