SAT Lines, angles, and triangles Question

Triangles PQR and LMN are graphed in the xy-plane. Triangle PQR has vertices P,Q, and Rat $(5,2),(5,4)$ , and $(7,2)$ ; respectively. Triangle LMN has vertices L,M, and N at $(5,2),(5,4+k)$ , and $(7+k,2)$ , respectively, where k is a positive constant. If the measure of $\angle Q$ is $t^{\circ }$ , what is the measure of $\angle N$ ?