Draw an ER diagram for the NCAA (National Athletic Association) football games. Here is the main information to be maintained in the database: 1. There are a group of teams. Each team has a unique id, a team name, and a coach; 2. There are a group of players. Each player has a unique number (within his team), a name, an age, and a telephone number. Each player belongs to exactly one team, and it is impossible for a player not to belong to a team; 3. There are a group of games. Each game has a unique game id, time, and venue; 4. The number of a player is only unique within his team, but is not unique across all the teams. For example, it is possible two different players in different teams having the same number 23; 5. Two teams play with each other in games. Each game involves a home team and a guest team (Hint: between games and teams, there exist different relationships demonstrating that a team is either a home or a guest team); 6. Players play in one, many, or simply no grams. Each game will have several players playing. If you feel that you must make some assumptions, please state them clearly. Remember to indicate the key for each entity, as well as the multiplicity of each relationship (e.g. one-to-many) using the appropriate notation