7 ) A b ) 4 = - 3x +12 Find the shaded areas. 8 ) a ) Find ( f (x) dx . - 2 - 8 4= f (x ) y = fix ) Area A = 6 b ) what is Area C = 10 Ana B ? S' fix ) dx = - 3 - 3 Fill in the 19 ) a ) 8 6 12 x -13 2 dx = ) d = 17 's ( on your own paper ) to do U = 1 this definite integral by du= substitution. b) Find the average value of, fox= Jy on [', 4]. 10) P - 3 = 3x2 a ) what is supply s ( x)? What is demand DIXI? P - 12 = - 6x b) Find market equilibrium ( Xe, Pe). X 20 C ) Find producer surplus