The image you've provided shows a graph of the function $f(x)$ and the question is asking to determine all intervals on which $f(x) \geq 0$.

To solve this:

1. Look at the graph and identify the points where the function is equal to zero. These are the x-values where the curve crosses the x-axis.
2. Determine the regions where the graph is above or on the x-axis, which corresponds to $f(x) \geq 0$.
3. Express the intervals where the function satisfies this condition.

Let me analyze the graph to identify these intervals.

Give me a moment!Based on the graph shown in the image:

1. The function $f(x)$ is above or on the x-axis in certain intervals.
2. From the graph, we see the curve is above the x-axis between two points, and it touches or crosses the x-axis at specific points. By identifying these points where the graph crosses or touches the x-axis, you can determine the intervals where the function is greater than or equal to zero.

If you have any additional details about the graph (such as the values at specific points), feel free to share, and I can provide a more accurate answer. Would you like me to give more detailed steps to interpreting these intervals, or do you need any further clarification?