Answer to Question 1
By presenting three versions of the same nuta, each from a different genre depending on its manner of performance and its function.
Answer to Question 2
Grale musicians use nuta (pl. nuty) to refer to a melodic idea or tune family (i.e., melodic variations--various versions of a melody are equally acceptable), which is the basis of muzyka Podhala.
Different versions of a melodic idea result from improvisation in live performances resulting in no fixed (definitive) version of a melody.