1) The film 'The Lake' follows conventions of a thriller genre such as using claustrophobic spaces like attics to create tension, but also challenges conventions through an ambiguous ending and non-linear narrative.
2) The film represents age through the protagonist, a young male adult, and uses color like red to represent danger when introducing the antagonist.
3) In terms of style, the film challenges conventions through sudden changes in pace compared to typical slow buildups in thrillers, and uses non-linear editing compared to typical linear narratives.