The three objects shown in the figure above have masses given byA: 240. g B: 130. g C: 280. g. They are connected by massless, rigid rods. What are the coordinates of the centre of mass? (6.00 cm, 2.67 cm) (7.38 cm, 2.95 cm) (5.00 cm, 5.00 cm) (4.80 cm, 1.92 cm)