4. Find the volume of the solid obtained by rotating the region bounded by the graphs of: a. y= x -9, y= 0 about the x-axis. b. y =16-x, y=3x+12, x=-1 about the x-axis. c. y = x- + 2, y= -x2 + 10, x 2 0 about the y-axis. 5. Evaluate the following indefinite integrals: 6 a. dx b. | dx C. cdx d. dx x V36-x 2 vx +9 x vx -36 6. Evaluate the following indefinite integrals: 3x+7 5x+6 dx c. 3x + 2 12-8x -2x2+4x+4 x2+6x+9 dx b. dx d. dx e. J x- -36 x- +2x -8 x2(x-6) dx x(x-2)2