Hello I'm in AP calculus. I don't understand on how to go about these questions. If you can solve them step by step so I understand that would be gladly appreciated. Thank you for all that you do.

In Exercises 7-8, use the graph of f shown below consists of line segments and a semicircle, as shown in the figure. *Use geometric formulas. (4. 2) 7. Find the net signed area between the function and the x-axis over the interval [-4, 6]. 8. Find the total area between the function and the x-axis over the interval [-4, 6]