Answer:
(a) It is a game because each decision has an attached payoff with it.
(b) It is a decision because Frugal Fred have to select from two given options. Since yes or no decision to be made.
(c) Here, payoff is attach with the decision. Therefore, it is a game.
(d) The decision to pay fee to Amazon or iTunes has an attached payoff with it, so it is a game.
(e) It is a decision because no other alternative attached with the decision. The tariff will be imposed by the china irrespective of the America's reaction over this.