\fFind the center of mass of a sphere of mass M and radius R and a cylinder of mass m, radius r, and height h arranged as shown below. Express your answers in a coordinate system that has the origin at the center of the cylinder. (Assume that the +x-axis is to the right, the +y-axis is up along the page, and the +z-axis is out of the page. Use any variable or symbol stated above as necessary.) (a)