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The heights of high school sophomore boys are approximately normally distributed with a mean of 66...

  1. The heights of high school sophomore boys are approximately normally distributed with a mean of 66 inches and a standard deviation of 4.2 inches. (I need help on number 4).
    1. What percent of boys are shorter than 5 foot tall? .766
    2. What is the probability of choosing a boy who is 5’11” or taller? .1169
    3. How tall would a boy be if he was in the 96th percentile of heights? 73.4
    4. What is the first quartile of heights?
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