38. Use Figure 5.45 to find the values of 2 a. f (x) da 7 b. / f (x) da c. ( f (x) dac 8 d. f(x) dx 5 - N f(x) X 2 4 6 8 10 Figure 5.45: Graph consists of a semicircle and line segmentsI In Problems 394-2, find the integral by finding the area of the region between the curve and the horizontal axis. In Problems 72-75, use Figure 5.46 to find limits a and b in the interval [0, 5] with a