The designer of an adventure game wants a player to be able take (and drop) various items found in the rooms of the game. Two of the items found in the game are bags and boxes. Both bags and boxes can contain individual items (money, tokens and food) as well as other bags and boxes. Bags and boxes can be opened and closed and items can be added to or taken from a bag or box.

a) Which GoF design pattern might be a good choice for the above problem? Justify briefly your decision.

b) Please provide a UML class model for the above file system problem and based on your answer in a.). Include operations and cardinalities based on the problem description