half of a slab is made of aluminum (density = 2.70 g/cm^3) andits length is 11.0cm, its width - 13.0 cm, and its height - 2.80cm;the other half of the slab is made of iron (density = 7.85g/cm^3) and its dimensions are: length - 11.0 cm; width - 13.0 cm,and height 2.80 cm. Where is the center of mass of the slab?