A seesaw has an irregularly distributed mass of 50 kg, a length of 3.0 m, and a fulcrum beneath its midpoint. It is balanced when a 60-kg person sits on one end and a 90-kg person sits on the other end. a. Find the position of the center of mass of the seesaw relalive to the fulcrum Express your answer with the appropriate units. Enter negative value if the center of mass is located closer to the 60-kg person and positive value if the center of mass is located closer to the 90-kg person
b. Find the position ot the center of mass ot the system relative to the seesaw'a midpoint Express your answer with the appropriate units. Enter neqative value if the center of mass is located closer to the 60-kE person and positive value if the located eloser to the 90-k person.