Range

Fill in the points of every team of the following classification of the teams of the League of the Spanish soccer:

Find the range of the points of the teams.
Find the range of the points of the teams in positions to play European competitions the following year (the first six teams in the table).
Find the range of the points of the teams in relegation position (the last three teams in the table).

We define the following scorings.

The range of the points of all the teams is: $$81-28=53 \ \mbox{points} $$
The range of the points of the teams in European positions is: $$81 - 54 = 27 \ \mbox{points} $$
The range of the points of the teams in relegation is: $$29-28 = 1 \ \mbox{point} $$