7 or 8 depending on tornament in the professionals including the chair umpire.
there are seven judges in a regular football.
there's about three
There are seven officials on the field during a football game.
Three (at least in High School) One at the net and two line judges in opposite corners.
11
one
5400
42
36
Four quarters in a football game
there is no national game, but many people love football.
2,550
It is a variable