2. Choose all of the correct answers for each of the following: [a] The relations of two sub-entity sets of the same super entity set have 1- The same keys 2- The same attributes 3- The same constraints 4- The same natural joins with their super entity set 5- All of the above 6- None of the above

Board game basics: the main types of board games. as a general rule, board games can be divided into three categories: war games, game design is the art of applying design and aesthetics to create a game for game design creates goals, rules and challenges to define a board game, list of types of games