An atom consists of electrons, protons, and neutrons. Each electron has a charge of -1, each proton has a charge of +1, and each neutron has no charge. If 3 electrons are removed from each of 4 atoms, what is the combined net change to the charge of the 4 atoms? Complete the steps below to solve this problem and others like it. Part A Three electrons are removed from each of 4 atoms. Write an expression to represent the net change on the charge for the group of atoms. Part B Simplify the expression obtained in part A and explain what the answer represents. Part C Here’s a similar problem. Write an expression for the net change in charge if two electrons are added to each of six atoms in a group. Also, write an expression that represents removing two protons each from a group of six atoms. Part D Simplify the two expressions in part C. Part E How are the two products in part D related?Part F Think about multiplying any two rational numbers. Based on this activity and your previous work, write a set of rules for finding the sign of the product based on the sign of the two numbers being multiplied.