A survey was conducted to measure height off men. In survey, respondents were grouped by age. In the 20-29 age group, the heights were normally distributed, with a mean of 69.2 inches and a standard deviation of 2.0 inches.
a) Find probability that his height is less than 66 inches?
b) Find probability that his height is between 66 and 70 inches tall?
c) Find probability that his height is more than 70 inches tall?