Consider the following strategic setting. there are three players, numbered 1, 2, and 3. player 1 has two cards, labeled king and ace. at the beginning of the game, player 1 deals one of the cards to player 2 and the other card to player 3; that is, player 1 either gives the ace to player 3 and the king to player 2 (call this the action a) or the king to player 3 and the ace to player 2 (action k). player 2 observes the card dealt to him; player 3 does not get to see the card dealt to her. player 2 then must decide between switching cards with player 3 (s) or not (n). player 3 observes whether player 2 made the switch, but does not see her card. finally, player 3 responds to the question “is your card the ace? ” by saying either “yes” (y) or “no” (n). if player 3 correctly states whether her card is the ace, then she obtains a payoff of 1 and the other players get 0; otherwise, players 1 and 2 both get a payoff of 1 and player 3 obtains 0. represent this game in the extensive for

a  social news website  is an  internet  website  that features  user-posted stories. such stories are ranked based on popularity, as voted on by other users of the site or by website administrators. users typically comment online on the news posts and these comments may also be ranked in popularity. since their emergence with the birth of  web 2.0, social news sites have been used to link many types of information, including news, humor, support, and discussion. all such websites allow the users to submit content and each site differs in how the content is moderated. on the  slashdot  and  fark  websites,  administrators  decide which articles are selected for the front page. on  reddit  and  digg, the articles that get the most votes from the community of users will make it to the front page. many social news websites also feature an online comment system, where users discuss the issues raised in an article. some of these sites have also applied their voting system to the comments, so that the most popular comments are displayed first. some social news websites also have a  social networking  function, in that users can set up a user profile and follow other users' online activity on the website.