Pls help me with the question. With explanation too, for 90 points and brainliest.

In a small section of a stadium there are 40 spectators watching a game between the cook islands and fiji. they all support at least one of the two teams. 25 spectators support the cook islands and 16 of these support both teams. how many support only fiji?

The sum of five and a number n is at least 12

What number gives you a irrational number when added to 2/5