Four identical metallic objects carry the following charges: +5.0 µC, +5.0 µC, -8.2 µC, and -4.0 µC. The objects are brought simultaneously into contact, so that each touches the others. Then they are separated.
(a) What is the final charge on each object?
_____ µC
(b) How many electrons (or protons) make up the final charge on each object?