Total cholesterol in children aged 10-15 years is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.

#1. Total cholesterol in children aged 10-15 years is assumed to follow a normal distribution with a mean of 191 and a standard deviation of 22.4.a.what proportion of children 10-15 years of age hfave total cholesterol between 180-190?b.What proportion of children 10-15 years would be classified as hyperlipidemia(assume that hyperlipidemia is defined as a total cholesterol level over 200)?c.if a sample of 20 children are selected, what is the probability that the mean cholesterol level in the sample will exceed 200