I'm struggling in the process of the questions 5, 9, 11; I attached the answer of these questions in the last image as the book provided. Please help me, thank you so much!

In Exercises 9 - 12, a region of the Cartesian plane is shaded. ded. Use the Shell Method to find the volume of the solid of revo- evo- lution formed by revolving the region about the x-axis. y = 3-x 9. 2 -2 -1 1Problems In Exercises 5 - 8, a region of the Cartesian plane is shaded. Use the Shell Method to find the volume of the solid of revo- lution formed by revolving the region about the y-axis. y = 3-x 5. 2 - 2 X -1 1 2 10 y = 5x 6. 5 0.5 1 X 1.5 2