Solve the each part of given problem:

Problem: Two identical conducting spheres, fixed in place, attract each other with an electrostatic force of 0.138 N when their center-to-center separation is 67.1 cm. The spheres are then connected by a thin conducting wire. When the wire is removed, the spheres repel each other with an electrostatic force of 0.0343 N. Of the initial charges on the spheres, with a positive net charge,

Part I: What was the negative charge on one of them?

Part II: What was the positive charge on the other? (Assume the negative charge has smaller magnitude.)

Please help for the above problem, completely confused!! Show each steps if possible, Thanks.