hi there I was wondering if you guys would happen to know the most effective ways to get the kanto starter pokemon because using friend safari seems kind of ineffective and slow.
also how would one obtain fossils aside from the original glittering cave ones thanks


Question: Reflection across the plane
Answer: $R$ is the matrix whose columns are the results of reflecting $(1,0,0)$, $(0,1,0)$, and $(0,0,1)$ across $S$. So, can you work out the result of reflecting each of those three vectors across $S$?