Coordinate Geometry: JEE Main 2024 Mathematics question

A ray of light coming from the point $\mathrm{P}(1,2)$ gets reflected from the point $\mathrm{Q}$ on the $x$-axis and then passes through the point $R(4,3)$. If the point $S(h, k)$ is such that $P Q R S$ is a parallelogram, then $hk^2$ is equal to: