3. Are the following statements normative or positive, or do they contain both normative and positive statements?

a. A higher income tax rate would generate increased tax revenues. Those extra revenues should be used to give more government aid to the poor.

b. The study of physics is more valuable than the study of sociology, but both should be studied by all postsecondary students.

c. An increase in the price of wheat will decrease the amount of wheat purchased. However, it will increase the amount of wheat supplied to the market.

d. A decrease in the price of butter will increase the amount of butter purchased, but that would be bad because it would increase Canadian?