Indicate which of the functions of money (a medium of exchange, a unit of account, and a store of value) each of the following performs in the U.S. economy. Check all that apply. Medium of Exchange Unit of Account Store of Value Plastic credit card O Picasso painting O O Japanese yen O O U.S. penny O 0 Given your answers to the previous task, indicate whether each of the following is considered money in the U.S. economy. Money Yes No Plastic credit card O O Picasso painting O O Japanese yen O U.S. penny O O