For the following exercises, find the volume generated when the region between the curves is rotated around the given axis. 140. y = 3 x, y = 0, x = 0, and x = 2 rotated around the y-axis. - 141. y=x3, x = 0, and y = 8 rotated around the y-axis. 142. y = x, y=x, rotated around the y-axis. 143. y = x, y = 0, and x = 1 rotated around the line x = 2. 144. y=4, x = 1, x = 2 and y = 0 rotated around the line x = 4. 145. y=x and y = x rotated around the y-axis. 146. y=x and y = x rotated around the line x = 2. 147. x = y, x = 1, x = 1, and x = 2 rotated around the x-axis.