Potential Ability in each category

Hi,

I've been a little confused about this for a while. My question is:

If, for example, Genie shows that the max stat a player can reach in both tackling in marking is 15, is it set at that? Or can the player get higher in one category and lower on the other (eg 14 and 16/ 18 and 12) depending on their training?

Thanks

The max stats are based on the player's training, the player's current stats, the player's age, and the player's PA (potential ability). So number two, because FM has no set potential individual stats.

Thanks