Four beads, each of mass m=1 kg, are attached at various locations to a ring, also of mass m=1 kg, and radius R=1 m (see figure). Find the coordinates of the center of mass of the system consisting of the ring and the beads. Angle A, located between the first bead and the horizontal, is equal to 49°. Angle B, located between the horizontal and the second bead, is equal to 50°. Angle C, located between the third bead and the horizontal, is equal to 70°. Angle D, located between the horizontal and the fourth bead, is equal to 39°.