7 [8 pts] Consider the graphs of the functions (r) = 2r + 10 (in red) and g(x) = 4r + 16 (in blue) graphed in the figure on the interval [-2, 5]. The two graphs intersect at (-1, 12) and (3, 28). (Don't compute these intersections ! they are given.) 60 50 40 - 30 y = 4x+16 20 y = 2x +10 a) Using definite integrals, write the area (in green) enclosed between the two graphs when -2 x 5. (Do not calculate its value.) b) Using definite integrals, calculate the area enclosed between the two graphs when -1 r