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question is attached below The weights of a population of 16-year old girls are approximately normally distributed with mean 60.4 kg and standard deviation 6.2

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The weights of a population of 16-year old girls are approximately normally distributed with mean 60.4 kg and standard deviation 6.2 kg. (a) What proportion of these girls weigh between 52 kg and 62 kg? (b) What is the chance that one of these girls, chosen at random, would weigh over 55 kg? ((2) What are the lower and upper limits of the middle 80% of weights in this population

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