Yerba mate is a plant whose leaves are used to make a beverage called mate, the national drink of Argentina and Uruguay. Mate is a caffeinated infusion, much like a cross between green tee and coffee, that is prepared by steeping dried leaves in hot water. It is traditionally served in a hollow gourd with a metal straw and is usually enjoyed in a social setting. Uruguay enacted a national law that prohibits drinking mate while performing what other activity? Discuss