Part II Sketch the region bounded by the curves y = 3x, y = 12 - 3x, and y = 0. Label all the intersection points. Variable of integration: 1. a. Sketch a picture of the region revolved around the x-axis. b. What's best method to compute the volume of the solid? Fill in the chart for that method, and compute the volume. (You onl have to ll in one column of the chart.) Disks / Washers Shells Inner Radius (1.12.1: Outer Radius 0.11): Jr 2m(Radius)(HeighI)d_