Two small-sized objects are placed on a uniform 9.00 {\rm kg} plastic beam 3.00 {\rm m} long, as shown in the figure below . Assume that m_1 = 7.90 kg and m_2 = 7.60 kg. Find the location of the center of mass of this system by setting x=0 at the left end of the beam. Find the location of the center of mass of this system by setting x=0 at the right end of the beam.