Diagram shows a kite $\displaystyle PQRS$.Points $\displaystyle P$ and $\displaystyle R$ lie on $\displaystyle Y-$axis and $\displaystyle X-$axis respectively.Point $\displaystyle S$ is

$\displaystyle (-1,5) Q(6,12)$

a)Given $\displaystyle PS = PQ$, Find

i)the equation of $\displaystyle PR$