Forty-eight-year-old carlos has noticed that he tires easily and often get headaches when doing computer work. he also needs to hold material with fine print at an arm's length to read it. most likely carlos is experiencing:

Most likely Carlos is experiencing "presbyopia".

Presbyopia is a characteristic piece of the maturing procedure. It is because of solidifying of the focal point of the eye making the eye center light behind as opposed to around the retina when taking a gander at close questions. It is a sort of refractive blunder alongside myopia, farsightedness, and astigmatism.

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.