The graph of $f$ is shown below. Evaluate each integral by interpreting it in terms of areas.

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1. $\displaystyle \int_{-1}^2 \! f(x) \, dx =$

2. $\displaystyle \int_2^4 \! f(x) \, dx =$

3. $\displaystyle \int_{-1}^7 \! f(x) \, dx =$

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Note: You can click on the graph to enlarge the image.

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