As one travels east into the next time zone, the time is one hour

When traveling to the East, Add one hour to the time.

One hour ahead. The father east you go you add a hour. Hope that helped!

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.