The reading speed of second grade students is approximately normal, with a mean 83 WPM and a standard deviation of 11 WPM. (round your answer to 4 decimal places ) a) What is the probability a...

The reading speed of second grade students is approximately normal, with a mean 83 WPM and a standard deviation of 11 WPM.(round your answer to 4 decimal places )

a) What is the probability a randomly selected student will read more than 88 WPM?

b)What is the probability that a random sample of 25 second grade students results in a mean reading rate of less than 79 WPM?

c)What is the probability that a random sample of 17 second grade students results in a mean reading rate of more than 86 WPM?