exclude leap years from the following calculations. ​(a) compute the probability that a randomly selected person does not have a birthday on december 9. ​(b) compute the probability that a randomly selected person does not have a birthday on the 3rd day of a month. ​(c) compute the probability that a randomly selected person does not have a birthday on the 30th day of a month. ​(d) compute the probability that a randomly selected person was not born in february.