Hello I'm in AP calculus AB and I'm trying to understand these 3 questions. I would gladly appreciate if you show step by step with work . Thank you for all that you do.

Sketch the region whose area is given by the definite integral. Then use a geometric formula to evaluate the integral. (8 1 x dx 8. So(8 - 2x) dx 9. , V49 -x2 dx The graph of f consists of line segments and a quarter circle, as shown in the figure. Evaluate each definite integral by using geometric formulas. 10. a) Is f(x) dx = b) S', f ( x ) dx = c ) Saf ( x )dx =