In a survey of a group ofmen, the heights in the20-29 age group were normallydistributed, with a mean of 68.9 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 67 inches.

The probability that the study participant selected at random is less than 67 inches tall is

(Round to four decimal places asneeded.)

(b) Find the probability that a study participant has a height that is between 67 and 71 inches.

The probability that the study participant selected at random is between 67 and 71 inches tall is

(Round to four decimal places asneeded.)

(c) Find the probability that a study participant has a height that is more than 71 inches.

The probability that the study participant selected at random is more than 71 inches tall is

Round to four decimal places asneeded.)

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

A. Therearenounusualeventsbecausealltheprobabilitiesaregreater than 0.05.

This is the correct answer.

B. The events in parts (a)and(c) are unusual because its probabilities are less than 0.05.

C. Theeventsinparts(a),(b),and(c)areunusualbecausealloftheirprobabilitiesare less than 0.05.

D. The event in part (a) is unusual because its probability is less than 0.05.