16)(12) A torus is a three dimensional solid formed by rotating a circle about a line. Note formula for a circle centered at origin is \( x^{2}+y^{2}=1\) a) Find the volume of the torus centered at the origin with a cross section of a circle of radius 1 formed by rotating a circle of radius one about a point 5 units from the center of the circle, using the shells method: [Text Wrapping Break] b) Repeat the above problem, but use the washer method. c) Do it the easy way - Use the theorem of Pappus.