R is the region bounded by y = x +x, y = 0, and x = 2.

S is the solid obtained by rotating R about x = 5.

T is the solid obtained by rotating R about y = 0.

- Provide integrals for the x an y values of the centroid of R.
- Provide an integral for the volume of S. (know how to do this one)
- Provide an integral for the surface area of the boundary surface of T.