My possibilities are:
a X->->Y, X->->Z
b Y->->X, Y->->Z
c Z->->X, Z->->Y
This is an example of an exam question which I will most definitely get. The problem is I don't understand the first thing about this 4th database normalisation technique.
What I got from many Google-searches and YouTube-movies is that if X->->Y that means that for 1 X-value there are multiple Y values.
But how do I determine which one of these rules applies to the given table?
I've included a screenshot of set table as an attachment, if anyone could help me figure out this 4NF I would be ever grateful.