Suppose you are given the following requirements for a simple database for the National Football League (NFL). Your model should capture the following information:

- The NFL has many teams

- Each team has a name, a city, a coach, a captain, and a set of players.

- Each player belongs to only one team.

- Each player has a name, a position (such as center or middle linebacker), a skill level, and a set of injury records.

- A team captain can also be a player.

- A game played between two teams (referred to as host_team and guest_team) and has a date (such as May 11^th, 2022) and a score (such as 4 to 2).

Draw an entity-relationship diagram to model the information described above. Underline the key attributes of each entity in the diagram. Make any necessary and logical assumptions. State any such assumptions clearly. If there are any constraints in the problem that could not be expressed in the diagram, state these clearly.