2. Consider a tennis game. There are two players. A player can serve and hit back the ball. A player has strength and experience which effect the hit angle and speed accuracy of the ball. During gameplay, the referee checks the ball if the ball remains in the tennis field or hit the net. Scoreboard displays the game info and also there exist a history table for every player showing their past game results. a) Specify two non functional requirements that would be important for such an application. Why? b) Find relations between objects and draw a class diagram showing relations, dependencies, compositions, multiplicities (cardinalities) etc. c) Draw a sequence diagram for the "game play" scenario.