1. The lengths of a particular animal's pregnancies are approximately normally distributed, with mean =252

days and standard deviation =12 days.

(a) What proportion of pregnancies lasts more than 255 days?

(Round to four decimal places as needed.)

(b) What proportion of pregnancies lasts between 246 and 258 days?

(Round to four decimal places as needed.)

(c) What is the probability that a randomly selected pregnancy lasts no more than 249 days?

(Round to four decimal places as needed.)

(d) A "very preterm" baby is one whose gestation period is less than 222 days. Are very preterm babies unusual?

The probability of this event is_______. (round to 4 decimal places) so it_____( a) would not, b)would) be unusual because the probability is _____( a)less or b) greater) than 0.05.