I really need help on this question if anyone could help

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?

Me max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.

1/2+1/6-3/4 simplify the given expression leaving the answer in improper fraction form.