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Please help with this hw question (9) The length of human pregnancy is normally distributed with mean 266 days and standard deviation of 16 days.

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Please help with this hw question

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(9) The length of human pregnancy is normally distributed with mean 266 days and standard deviation of 16 days. (a) (9pts) What is the probability that a random sample of 49 pregnancies has a mean gestation period of 260 or more? Draw a good diagram and show the Z-scores. (b) (9pts) What is the probability that a random sample of 64 pregnancies has a mean gestation period between 260 and 275? Draw a good diagram and show the z-scores

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