Given is Question and my approach of Solving problem. I don't have computer to type in text format so I'm attaching a Images Please don't down vote it.

Given is Question and my approach of Solving problem. I don't have computer to type in text format so I'm attaching a Images Please don't down vote it.

HINT.
Use the asymptotes as (oblique) coordinate axes. The equation of the hyperbola is then $xy=c^2$, where $c^2=(a^2+b^2)/2=61/2$. It is then easy to prove that: $$ y_L=y_P+y_Q=2y_R, $$ that is (if $P$ and $Q$ are on the same branch): $$ LO=PM+QN=2RE, $$ where $O$ is the origin.