In a survey of a group ofmen, the heights in the20-29 age group were normallydistributed, with a mean of 69.7 inches and a standard deviation of 4.0 inches. A study participant is randomly selected. Complete parts(a) through(d) below.

(a) Find the probability that a study participant has a height that is less than 66 inches.

The probability that the study participant selected at random is less than 66 inches tall is nothing.

(b) Find the probability that a study participant has a height that is between 66 and 72 inches.

The probability that the study participant selected at random is between 66 and 72 inches tall is nothing.

(c) Find the probability that a study participant has a height that is more than 72 inches.

The probability that the study participant selected at random is more than 72 inches tall is nothing.

(d) Identify any unusual events. Explain your reasoning. Choose the correct answer below.