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The diastolic blood pressure of a random sample of women had a mean of 67

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The diastolic blood pressure of a random sample of women had a mean of 67.425 mm of Hg and a standard deviation of 11.626

a) Calculate the percent of women that have a diastolic blood pressure below 75mm of Hg

b) Calculate the percent of women that have diastolic blood pressure above 50mm of Hg

c) Calculate the percent of women that have a diastolic blood pressure between 60 and 70 mm of Hg.

I am using Statkey (Under Theoretical Distributions- Normal) to find these answers but I am not sure If I am going about it right. Can you inform me how I should be calculating the answer for C ?