Find as many studies that support each of the 4 tenets and anlayse them
We are just trying to support the teent. For example tenet 1 says that a depressed person has decreases positive reifnrocment which in turn leads to depresed moood. In this case you need to fidn studies and evidence from this decade and maye less that supports this assumption.
I have attached a sample paper in the word documet
The document called “Paper to Analyse” may help but dont rely as that is just showing you the tenets.