40 According to a recent report from the US National Center for Health Statistics, feinales with age between 25 and 34 years have a bell-shaped distribution on height, with mean of 65 inches and standard deviation of 35 inches

a) Give an interval within which about 95% of the heights fall.

b) What is the height for a female who is three standard deviations below the mean in height Would this be a rather unusual height? Why?