4- True or false: the marginal utility to consumers of coffee will be higher the greater is the available supply of coffee to consumers. A- True b false 5 True or false: the Laffer curve alone does not reveal the optimal tax rate for society. A True b false 6- True orfalse: Kenneth Arrow proved that it is impossible for one economic entity - for example, a person, a firm, or a nation to have a comparative advantage over all of its trading partners in the production of every good and service. A True b false 7-True or false: A rising US. trade deficit means that global investors have reduced their willingness to invest in the US. 1- True or false: Unlike with demand curves, all supply curves have the same elasticity as each other. A- True b- false 2- True or false: The ad hominem fallacy is committed whenever someone judges the merit or truthfulness of an argument exclusively by the identity of the person or persons making the argument. A- True b- false 3- True or false: The fallacy of composition is committed whenever someone concludes that, if event B happened after the occurrence of event A, then event A must have caused event B. A- True b- false