3. (6 points) Using shell method, set up the integral(s) that permits to calculate the volume of the solid generated by revolving the region bounded by y = 4x - a and y = x2 about x=2 The graphs of y = 4x -x and y = x are given in Figure 2. Figure 2: 2 4. (5 points) Set up the integral(s) that permit to compute the area of the region described in Question 3 by integrating about the x-axis