Can you show all the work please

The image above shows a three-mass system on a line located in interstellar space with no external forces acting on our system. Masses A and C are xed in place and located at a distance of 17.74 and 2.90 meters from the origin, respectively. Mass C is seven times as massive as A and the gravitational potential energy of these two masses is measured to be 2.21SX10\"1 O Joules. Mass B is then brought to the origin as shown in the image and the gravitational potential energy of these three particles is measured again and found to be 4.394X10\"-9 joules. 1.} What is the mass value of A ? 2.} What is the mass value of C ? 3.} What is the mass value of B ? 4.} What is the magnitude of the net force on mass B when it is located at the origin '? 5.} How much external work must be done on the three-particle system in order to move mass B from the origin to the coordinate ( 0.00 , 14.84 J on the Cartesian plane