Solve the all parts of following question:
Question: Two point charges totaling 7.50 µC exert a repulsive force of 0.250 N on one another when separated by 0.583 m.
Part A: What is the charge on each?
Part B: If the forces are both attractive, what is the smallest and largest charge?
Show how you get the answer, so that I can better understand how to do it.