Two tiny conducting spheres are identical and carry charges of -26.5 C and +51.7 C. They are separated by a distance of 3.37 cm. (a) What is the magnitude of the force that each sphere experiences? (b) The spheres are brought into contact and then separated to a distance of 3.37 cm. Determine the magnitude of the force that each sphere now experiences, and state whether the force is attractive or repulsive.