7 Explain whether each of the following government activities is motivated by a concern about equity or a concern about efficiency. In the case of efficiency, discuss the type of market failure involved.

a regulating fixed-line telephone prices b providing some poor people with vouchers that can be used to buy food c prohibiting smoking in public places d breaking up Google and Facebook into smaller companies, each focused on a different product (for example, search, advertising, mobile operating systems)
e imposing higher personal income tax rates on people with higher incomes f instituting laws against driving while intoxicated.