Find the x-coordinate of the center of m?

Find the x-coordinate of the center of m of a composite object. A sphere, cylinder, and rectangular solid( in that order) all have a uniform composition. Their mes and dimensions are: sphere: 200 g, diameter = 10 cm; cylinder: 450 g, length = 25 cm, radius = 5.0 cm; rectangular solid: m = 325 g, length in x-direction = 16 cm, height = 10 cm, depth = 12 cm.