Imagine having a collection of charged marbles that retain their charge even when they touch other objects. Red marbles are positively charged, and blue marbles are negatively charged.

(a) What happens if you place a bunch of red marbles close together on a flat horizontal surface?

(b) What happens if you do the same with a bunch of blue marbles?

(c) What happens if you do the same with an equal mixture of red and blue marbles?

(d) What happens in part \(c\) if you have a few more red marbles than blue ones?

(e) As a whole, is the collection of marbles in part \(d\) positively charged, negatively charged, or neither?