People with williams syndrome often cannot tie their own shoes, make their beds, or perform simple arithmetic; but often they have great talent in the area of music or language. this illustrates the complexities in developing a definition of:

Need a picture of the map

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.