Aletter that explains how you are qualified for a job

That is called a resume it states what qualities you have and why your fit for the job.
It also gives info about what people think about how good you work.

Ifound the exercise on the internet. attached is the list mentioned above.in order for a compound to be considered optically active it can't have any axis or plan of symmetry. the molecule  shouldn't also  be superimposable on its mirror image.with such considerations, the compounds that are optically active are: -third compound on the first image is optically active; -second and third compound from the second image are optically actives.