Hi can someone show me the step-by-step answer to this questions? Please write it clearly and understandable.

Solids of Revolution

Instruction: Solve the following problems by showing your graphs and solutions please

1) Find the volume generated by revolving the area cut off from the parabola y = 4x - x by the x-axis about the line y = 6. 2) Find the volume of the torus generated by revolving the circle x2 + y2 =4 about the line x = 3. 3) Find the volume generated when the plane area bounded by y=-x - 3x + 6 andx+y - 3 =0 is revolved about x = 3